Just wondering if maybe thats whats affecting my Yahoo rankings, maybe Google too. I know I can't get the phplinkdirectory page rank to work, rumor is that happens when people on the server use SEO tools to frequently check PR of sites, and G bans the server from requesting PR. I was thinking if that happened, then maybe other things could be affected. I'm on a shared server. I didn't think Yahoo had a sandbox, and I've optimized the my pages nicely and am raping on MSN... but nowhere to be found on Yahoo. Their indexing all my pages though, but I'm not ranking.
PR requests are blocked from one of my servers for php.linkdirectory as well. I'm using a multisite plan at site5. All sites are getting indexed and achieving 3-4 page rank after a few months on that server. I haven't run across any other apparent blocking. Interesting question though.