I get ALOT of email to my different accounts, depending on what it's for. And, I'm a big fan of IMAP so I can access my email from where ever I am, no mater if I've read it of not.
I was surprised to find out that gmail now supports IMAP access to your mail - I'm going to be turning this on as soon as I get home!
The only thing left to make Google's services 100% complete in my book would be to add NNTP service to the google groups system. Unfortunately, it seems it's not possible at this time according to http://groups.google.com/support/bin/answer.py?answer=46465&topic=9244
I think we should all be asking Google to support NNTP as soon as possible!