The only phone that I know that supports MP3 at 1 Gigabytes is the Sonyericcson P910
Most of the family of Treo 650-type devices are seen as either phones with PDA or PDAs you can make calls on. Important features are email, address book and software, but hardly anyone places the MP3 useability as a main feature. Sorry, I just don't care about a camera.
Which are the leading Smartphones that have reliable MP3 functions (like regular size headphone jack, preloaded RealPlayer, etc that Treo 600 lacks)? I'm not looking for a megagig player with 300 CDs on it, just something I can tote around 50-60 songs, and swap out when I get bored with some of them.
So far, the leaders seem to be Treo 650, SonyEricsson K700i or P910a, or other ones that look big and clunky, not sleek and sexy. Also, most reviews don't discuss the ease of entering text using the screen if you don't feel like using the keyboard (which some do/don't have).