I downloaded this app today ($5/mo or free if you have premium account) for my Samsung u740 and I have to say it works really well. It took only a second to sync it up to my AOL account and now I can get all my email with a very user friendly interface and get real time notification of new email.
I would like to see a few more options with the alerts. For example, it would be great to be able to set the audible alerts to go off only during certain times (like 8am to 10pm....when I'm awake). I'd also like to be able to set my own alert sound for incoming mail. Other than that it's working great and work the monthly subscription.