I use multiple accounts to separate people I follow closely from the flood of potentially-entertaining tweets, as per Atebits' recommendation. However, with Tweetie/Mac it's very tempting to leave the app running 24/7. My bulk account, however, has a far, far higher update rate than the stream I actually care to follow closely. As such, I'd love to be able to set auto-refresh parameters differently for the different accounts (and ideally *off* for my volume stream account) -- this would much more nicely match the experience on the iPhone app where you must explicitly browse into an account to see its updates, rather than being notified constantly and spuriously by the glowing icon.