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Having outgoing links to authority sites, shows an indication of usefulness for the end user which Google is looking for, because Google wants what's best for the end user. We have heard that from Matt Cutts time after time.

So, furthermore, first, I would just test it, because you don't know till you test.

What I would personally say would be have a mix of both (links to authority and internal links), because if you have been following the SEOmoz blog, the post today (http://www.seomoz.org/blog/facebook-twitters-influence-google-search-rankings) actually talks about ranking factors at the end with a power point, and internal links were still deemed a very valuable part of on-site optimization. So, I would change half of the outbound links to internal links.

Once again, just test it, then you can draw the conclusion yourself for your site and niche.

Not a problem. Let me know your results in a few weeks after you change the appropriate tags on your site. Keep in touch.

If you are listed in the DMOZ directory that could be affecting it, as Google sometimes pulls titles for sites based off of DMOZ. The amount of anchor text links pointing to your site with that keyword really shouldn't affect what the title tag says, but recently tests have shown that it can.

Always keep in mind though, that Google like "brands" because they like the trust that they bring for the users. Although, it could just be another thing Google is testing. My last point on the Title Tag change could be that Google decided that the Title Tags you gave them weren't relevant enough and you know, they could be pulling this from the anchors.

Anyways, the first thing I would try is make it so no robots use the DMOZ directory (also known as the: Open Directory Project) for titles and descriptions take a look at this link I found in a forum for you: http://www.v7n.com/forums/seo-forum/238598-how-can-i-remove-dmoz-description-about-my-site-google-yahoo-search-results.html

Let me know how long this Title Tag change has been going on, and we can test some things to get it back to normal.

Well, first off, you don't have very much content on the pages to start, which could hurt you in the long run. Now to answer your question, I'd say that the content is very similar and in the end one of them will get filtered out and the other won't get filtered (this is all deemed by Google). They will both probably stay indexed, but unless you have unique and different content for both, one will stay in the SERPs and one will be in the supplemental index. That's my two cents.

Agreed. You now have your work cut out for you Jose.

I would suggest that for each model you create different unique content on the page (as each model should have different features and variants). Now instead of adding a new page for each size of each model, have a drop down box (on the model's page) that lets you select the size, so the user can instantly see the sizes available for the model and then you don't have to scramble to generate new content for each size (which would be difficult). This is a win-win situation for the user and for the client. Hope that helps.

Have you thought about incorporating video into your message. This is a great way to keep the visitor on the site and have them do what you want them to do, like fill out a form, go to another page, etc. Video combined with autoplay, works great. After seeing many tests done on autoplay, it actually works. Anyways, suggesting that you add video was a bit off topic, but I thought I'd suggest it.

I would try spinning the articles and then adding them to different web 2.0 properties such as: Squidoo, Hubpages, etc. Here's a PDF of a list of them I found online: http://www.mediafire.com/?1hdlzwhz40n You can add in context links which will add additional value. This will also increase your unique domain count.

This is just Google likely testing the site, you may have heard of the term "Google Dance" this is likely what it is, but also, Google tests their SERPs immensely, so you may just be wrapped up in the test. Hopefully you don't get the shaft. I'd say, just wait a few days and see what happens.

You should funnel all of your users through the main site and give them the option to switch languages to help avoid having the same content on different pages. It sounds like they want to rank in each country, now to do that, just build links and get them from relevant sites in that country. Although if you are really stuck on staying with the original plan, I would say use the robots.txt file to still block the other language pages. The reason I say that is because the search engines have done filtering to additional language pages, because spammers have actually exploited language barriers in the past for autoblogging. They would translate content from another language, make it sound right and then put it on the blog automatically. That's the main reason for me recommending that you funnel people through the main site and have them translate, which where the translation site would be in a subfolder blocked with the robots.txt file. There are obviously many ways to go about this, some will agree, so won't, this is just my two cents. I hope this helps.