I configured all my emails to come to my Gmail account. I have three main emails and not only do I get them all in one place (filtered in their corresponding folders), I set up the account to respond with the email address it was originally sent to. Does this make sense? Hope so.
I use MAC and PC. When I'm on my MAC, I use to use Entourage and when at the PC, I'd use Thunderbird. In a third place, where it's a community MAC desktop, I'd have to use online webmail associated to all 3 of my accounts. What a pain?!?
The only thing I wonder is if I can customize 3 different signatures that is associated with each email addresses. I'll check out the Gmail discussion groups…I can't even gripe about their FAQ section because it's so well organized and clear! Really, I'm totally happy with my Google (homepage, gmail, and calendar). I know there are several other features left to be discovered (at least for me). For now I say, “Way to go Google! I'm a fan!”