Gmail
Shout out to Error (real names omitted) for the Gmail invite. I love it. I've also recently seen that you can get a Gmail invite just from signing up with Blogger. That would have saved me a lot of time but, oh well.
If you can get your hands on a Gmail account, you wont regret it.. It's super fast, 1000 megabytes of storage, has Google powered search capabilities, and can report spam in an instant. You can even filter out specific people's email to you. This is going to be the next big thing for sure.