Both blogs are running 2.0.4. Both at Hostgator. Both on cheapie hosting plans, but not on same server.
Personal blog admin loads quickly and completely, with all RSS feeds.
Sports blog dashboard loads extremely slowly, and doesn't fully load when done. However, all other admin pages are fully accessible and load lightning fast.
RSS feed problems loading, I know... but why on one blog and not on another? Would different servers receive RSS feeds at different speeds?
I disabled the sports blog dashboard with Filosofo's Remove Dashboard plugin. This removed the problem, but then my coaches couldn't log in using the Meta link, so I deactivated it.
Then I tried the Dashboard Options plugin, but even when I disable all RSS feeds, the dashboard loads just as slowly as before, and then does not completely load as before (can't see the WordPress footer with the version number, for example).
I finally settled for manually removing all the RSS feeds from the wp-admin/index.php, and now the sports blog dashboard is lightning fast again.
The only other difference between the two blogs is that the crippled dashboard sports blog also turned up a blank page after editing a post. The personal blog doesn't ever do that. Probably doesn't mean anything, but I thought I'd throw it in there.