Sending From MobileMe Alias

When I signed up for MobileMe I wasn't planning on sticking around so I didn't put a lot of thought into my nickname. Now, I have an iPhone and I've become quite the convert so I'm in need of a better name.

I was able to setup an alias without any trouble and I even got it working on my phone so that I can send from said alias.

I just have one question. When I send an email from that account it shows up in the recipients inbox as "firstnameLastName@mobileme.com" instead of just showing up as from "firstname LastName".

Basically what I'm asking is, is there a way to change the "From" name using an alias?

 

Update
The alias works fine when sent from the MobileMe website. It's just whenever I send an email from my iPhone that it appears in the From field in the recipients mailbox.