About a months ago I heard one of the best news about Gmail ever. They were planning to gradually implement POP3 mail checking of other email systems.
You could ask "why the hell should we care?" The answer is simple. If you're using multiple email accounts on different systems (hotmail, yahoo and etc) you noticed that simply forwarding messages to Gmail will not solve the problem of disabled accounts (each of those systems has inactivity timer, 1-3 months for most systems after which your account is disabled and/or canceled). POP3 mail checking on the other hand is considered activity by all mail systems.
After finding out about Gmails new feature I was disappointed to find out that it wasn't enabled in my account. But now it is! Now Gmail is a true replacement for desktop mail application.
Happy Gmailing :)
P.S. The limit is 5 accounts but for most of us it should be enough.