I don't know if you have tried
Facebook already, but I'm using it and its working great for me. Although you can use only one account in the basic version I've found it is better to push your Facebook account instead of define your email account.
The main reason is that once you installed emoze on your phone it downloads your entire Facebook friends list, which means, if you want to send an email via your phone you don’t need to remember any of your contacts email addresses, you just go to your friend list, choose one up and send him mail through emoze Facebook account.
More over, if your friends will have their accounts of Facebook on emoze as well, it will work better, you'll have an experience of instant messaging thanks to emoze push email technology.
By the way, I've just heard that emoze added
AOL as a data source. This is great news for millions of users of AOL all around the world.
For those of you who are not familiar with emoze you can read about it and try it for free at
www.emoze.com
Hope the information I've provided you with is helpful.
Best regards,
Roy