I am using Gmail for all of my (Apache) mailing lists, my private stuff, and sometimes I write emails to team-mates via my private Gmail account.
For 99% of my corp. emails, I am using Thunderbird, which is a FAT CLIENT.
I like using the Web-based email, but sometimes, the traffic is slow (depends on your connection, sure) and than… switching folders or searching can be a PITA. That is not the case in Thunderbird. That FAT CLIENT is working offline too.
Now there are “persistence frameworks”, such as Google Gears, which offer your a great deal to run your web-app offline.
But even with that, sometimes it just feels better to use a FAT CLIENT, IMO.
Using Web-Mail is common; word-processing or spreatsheets are new, but they are more and more used, in an online version.
All this is OK, the move is from the desktop to the WEB. Fine so far, but I’d never want to use my IDE (JDeveloper and Eclipse) via a Web-Browser🙂
That would be just too much. I hope that this isn’t the next trend🙂