I don't know what to say to this post.
Is it really news that Da-Lite is now partnered with some new mount manufacturer to hock their wares and has an industry standard mount selector at their site?
http://www.da-lite.com/products/index.php?cID=13
I went through their list of manufacturers for flat panels and there is like 30 manufacturers listed! Have you seen the competition?
Peerless:
http://www.peerlessmounts.com/
Right from their main page, it's there on the left with about 100 manufacturers and mounts designed for every product that is listed!
That's worth noting since I put in a NEC 701 display (70" LCD) and the Da-Lite manufacturer doesn't even have a mount which works with that large 260 pound model.
Chief:
http://www.chiefmfg.com/
Once again, right there on the main page on the right.
Again, with a solid 100+ manufacturers.
Premiere:
http://www.premiermounts.com/
This is one of the smaller manufactuers, and still a solid 60+ companies listed and right there on the left side of the main page.
Frankly, instead of worrying about what mount fits your TV, I would be looking for a mount that isn't a poorly built piece of junk.
A lot of the flat panel mounts do a great job.
For projectors, I have never - EVER - seen a mount that touches the quality of the Chief RPA Elite series. The Peerless one which is similar is second best, and still isn't close.
Heck, we should all be getting universal mounts anyway at this point.