Well I agree about the 250,000 submission schemes but I have to disagree with you on some of the worthwhile engines.
You left out Yahoo and MSN/Bing. (Not the Yahoo the paid directory, but the free search engine.) I believe they're still 2nd behind Google. Most of my traffic comes from Google, Yahoo and Bing and in that order. Do people even use Lycos, AlltheWeb and AltaVista anymore? I didn't think these sites were even around. Also, AOL and Netscape are both powered by Google with Netscape not even in the running.
I would estimate the top engines right now are...
1) Google
2) Yahoo
3) Bing (Formerly MSN)
4) Ask
5) AOL
6) A bunch of others that make up a very small percentage and not worth mentioning.