I'm still listed right at the top of the few yahoo searches I checked. I don't think yahoo cares how often you modify your pages as much as google does, that seems to be the only variable, or maybe the missing factor is page rank itself? I can't really say because I've never had a good PR really and I was absolutely fine before.

I seem to have traded great yahoo listings in exchange for great google listings.

I used the <link> tag heavily on my last site updates. I might have hit some factor in google that penalises excessive internal linking or something (there being both <a> links as well as <link> tags to the same pages on a lot of pages now).

Yahoo! Just totally loves me. dogpile is an awful engine but I'm okay (not great) on there. Okay on Lycos and Alta Vista totally loves me as well. MSN is a bit patchy, some first page listings, some second,. some nowhere at all on the first 3. I couldn't be bothered to check any others.

I don't think "link farming" is worthwhile just because of google PR. I'd rather spend time creating more content than mailing a bunch of people trying to get links, I just don't think it's the most efficient use of time at all.