That's the Treo 650. You can simulate an actual online experience, as you can download programs and files. It uses Windows Mobile. As the website states, you can email people using Gmail & Yahoo. It comes equipped with Bluetooth technology, an mp3 player and a digital camera. It's touch screen and comes with the touch pen.
It has dozens of other cool features like screensavers. It also shows you the phases of the moon and tells you when each one will occur.
My brother purchased his for $350 with a 2 year contract (once he got them to cancel his other one for free since it was months from expiring). I think he said that it costs $700 without a plan, but I don't he was positive.