I just started using my EVO in the MINI the other day - I use the music player and plug it into the aux. I was amazed today when I discovered that I can talk on the phone through the speaker system!
The EVO and the MINI are great devices - can't wait for flash for the EVO so that get all kinds of cool stuff!

 

I have an Evo also - awesome phone. I wish Mini would release an Android app like the MINI iPhone app.