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Awesomeness! Thanks Tom ;o)

I think you have to separate out a couple of issues here... First off, 250 links distributed across a site or 50 across 10 blog posts may have very little additional value than a few links on a site or 10 links on 10 blog posts. Linking root domains generally have a lot more impact than total links. If you've got 50 links on 10 posts to the same site, it's very likely some of those links are low quality (even not having any idea what the anchor text is). I'm assuming you mean inbound links all to the same site (and even the same page), though. It's really tough to talk in generalities. It depends a lot on the targeted text. If your exact-match anchor text is your brand name, or if it's product-oriented but matches your domain name, you'll get more leeway. If Apple has 10,000,000 links to "Apple, Inc.", Google won't care. If Bob's plumbing has 1,000 links and 90% of them are to "buy cheap viagra", that's going to look bad really fast. So, "excessive" can be very situational. If you're targeting one phrase over and over, most of your links are built/paid (not "natural") and that phrase is keyword-loaded without reflecting your brand, you're probably pushing too hard. Diversification is very important. I think targeting is important, to a point, but it's really easy to over-think it.

Are any of these domains indexed? Do any of them have links to them? If they are neither indexed nor have any links, then redirecting them will do nothing as search engines don't know they exist anyway. The only value for you is with direct traffic. When people misspell your domain if you have all those possible misspellings redirect to you then they end up on your site no matter what. You also prevent competitors from taking something very close to your domain name and pretending to be you. The only time this can have an effect is if you buy domains. If you go out and buy domains that are indexed with links to them and then 301 redirect all of them to your website then this is what is referred to as doorway pages. You are essentially buying pagerank. Google no like. I have had success with a domain like mythings.com and buying mything.com and redirecting it and getting a good bump. But it was only one domain and it was very similar. If you go out and buy expired domains or high PR domains and redirect them all you can have trouble. But in your case, just redirecting a bunch of domains that are essentially invisible to search engines won't have any positive or negative effects.

Thanks guys