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Right now, my favorites are Pagelever, Edgerank Checker, and Blitzmetrics.

Good stuff! It seems that this issue is tripping a few people up. If this turns out to be the definitive solution be sure to update this thread - I wont be able to sleep until I know I've truly earned my first Moz Points! ;o)

Thanks Wissam. Always good to hear it from someone else rather than Google.

The challenge is we are speaking in general terms. It would help if you shared a lot more specifics. Generally speaking, if the blog content was directly related to my domain, I would want the blog to be on the main domain. If I had corvettes.com and I wanted to add a blog discussing corvettes, I would choose something like corvettes.com/blog. If I had corvettes.com and I wanted to add a blog discussing cars in general, I may wish to separate the blog from my core site by using a subdomain. There will certainly be some relevant opportunities between the blog and the main site. If I wanted to create a blog to discuss unrelated matters, then I would pursue a different url altogether.

Hi, SEOmoz does have a market place, many great professionals there http://www.seomoz.org/marketplace, if you want to take a look yourself run your site on the SEOmoz campaign tools, you will see errors, 404s, duplicate content, anything that could be hurting your site from within, also use the http://www.opensiteexplorer.org/, to check if the links are still there or if you left out any pages that were getting links. i don't really trust GWT that much, the data is just too weird some times: back links that don't exist, strange 404s, etc. By experience I found that every time I have some broken links, even if they are only 50-100, GWT shows me like 10.000 new errors, after they are fixed, the errors on GWT start to go down too. Some times huge design (code) changes can affect your site rankings on Google for a while, based on the an idea like: "if the people who link to you saw your site now that is different, will they still be linking to you?". I wouldn't mind to take a look

The site I have seen the most for WP templates is: http://themeforest.net/ I have no personal experience with the site so I cannot comment further. There are plenty of sites which offer designs if you are unhappy with that site. They seem expensive to me, but they have a ton of designs and several look exceptionally nice.

Now it is my turn to agree with EGOL. I would add one idea. In general I prefer not to share content but it can offer value to periodically share a selected article and gain backlinks to your site.

What shood i do?

Would it be better to create sub-domains for those translations (same content, different language) or sub-folders? You can safely use either method. For the most part it is solely a matter of your preference. Neither choice has a SEO benefit nor disadvantage when compared to the other. If it was my site, I would choose to go with the subdomain approach as a means of separating the content. The site structure would be identical other then the prefix. It would be easiest to manage in my opinion. But who am I? How about listening to Matt Cutt's opinion http://www.mattcutts.com/blog/subdomains-and-subdirectories/

If all your dealers are running your copy on their sites, verbatim, that could be a piece of your problem... certainly worth looking at. It's not uncommon for an affiliate to out rank their principal even though the principal had the original content up for a year or more prior. Another thing worth keeping in the back of your mind, as you chase this down - sometimes we don't drop in the SERPs because we dropped, but rather because someone else ROSE.

We simply have the .pdfs on our own site and many people link to them.  We are happy to have those links and those links make these .pdf documents rank in the SERPs for important keywords (you can edit the properties of a .pdf document to produce a "title tag" that will optimized them and display in the SERPs.). We could add a notation to our website that invites people to post them on their own website or add customized branding (still keeping the embedded links to our own site).   Or, we could contact webmasters who link to them on our site and offer the custom brand if they host the document on their own server.  That would get us some additional backlinks.

I agree with John and Steven. We manage a number of sports blogs, and I have my content writers link back to old posts using new posts.  If there is a legitimate reason to link to the old post then go for it.  For a local music blog, I frequently write content that has no expiration date.  For example, I may post all summer about bands coming to town, or write reviews, but every few posts I might write a “top five music clubs in town” post. Those posts are relevant to my blog, they can be linked back to at a later date, and have the chance of picking up traffic at any time (depending on the search.)  Analytics will also tell you which posts are getting traffic, no matter how old the post may be.  That should give you a clue to what stays relevant.

Digging in further I discovered that rogerbot had blocked a portion of these URL variations, but 2/3 slipped through. I sent an email to support. Thanks for the suggestion.