Except for the lack of logs, I really like (NO INSTALL) http://www.meebo.com for signing into AIM/ICQ, Yahoo, Jabber/GTalk and MSN either separately or all at once. Check box before clicking to Sign On as invisible.
*Joining for an acct isn't mandatory, just convenient.
Yeah meebo is the best web-based one. If you don't want to download software meebo is the best choice. Not sure but I do believe if you sign up for a meebo account then you can set it up to save chat logs if that's what you meant by lack of logs 
I used to use easymessage, but its not been updated for 2 years and last time I tried it it wouldn't work right. Probably just me though, I'm sure it still works fine. It's a great, easy to use & lightweight client.
The only thing I don't like about EasyMessage is I can't get the Audibles or Emoticons.
Commenting by HaloScan
