Yes, I bought one, its windows mobile so the platform is the same.
Internet is the same, mine has an internal wifi modem, plus its also gsm/gprs so anywhere in the coverage I can surf the internet.
It had more features than any phone/pocket pc that you could buy in the US at the time plus I can take it overseas no problem.
If it wasnt for that, Id just have saved the money, those new Treo's I see advertised on commercials look pretty cool for 399$, not sure if it has a wifi internal modem.
No matter what you get you have to get a contract, since I can go overseas with it and slip in a new card. I dont have to worry about paying overseas rates to Cingular which would be like a buck a minute to use my phone or something crazy. Plus my contract was that I had to pay full retail for another phone so I chose the unlocked phone for several reasons and paid more.
I went through
www.celluloco.com but found slightly cheaper places later.
I also saw quite a few unlocked phones on ebay. I couldnt use mine with Verizon though, just cingular and tmobile