So I just got a T-mobile Dash phone and it is SWEET.
It's got Windows Mobile 5 on it, direct email (a la Blackberry) with a full keyboard, ability to see Word, Excel, Powerpoint, camera, video, music, etc. Heck, you can even watch recorded TV shows.
It's got built in Wi-fi, so I can surf the Net from the phone using any wireless connection (like the one in my house...or Starbucks...or your house).
But here's where it gets AWESOME.
I downloaded and installed Skype for Windows Mobile.
I signed into Skype...and using the wireless connection, made a Skype call on my phone.
Now, I can call anyone, anywhere in the world (who has Skype) from my mobile phone...with no extra charges (I have an unlimited $19.99/month data plan).
TREMENDOUS! I live for this stuff 😉