Yes! In fact there is a customized version of Pocket Tunes bundled with the Treo 680, 700p and 755p. Pocket Tunes 4 Deluxe and Basic are also compatible with the all devices, as is the trial version as well. Please note that the 755p was released after Pocket Tunes 3.1.8. Therefore not all features are available on the 755p with Pocket Tunes 3. Pocket Tunes 4 fully supports the 755p. For more information please see this Knowledge Base article.
If you are interested in using Pocket Tunes with Online Stores (like Napster, Rhapsody, Yahoo, MSN Music etc) you need to have Pocket Tunes Deluxe. NOTE: when you purchase Pocket Tunes Deluxe we provide a 15 day money back guarantee so that you can try it with the online store to make sure it works to your satisfaction.
You can download and install the Trial version from http://www.pocket-tunes.com/download.html . Customers who have purchased one of these Treos can use their Registration Code that comes with the built in version of Pocket Tunes, to purchase Pocket Tunes Deluxe at a discount. To determine your Registration Code, open Pocket Tunes and go to the menu, click 'Help', then 'About Pocket Tunes' and write down the Registration Code and store it in a safe place.
Once you have your code, enter it here, http://www.pocket-tunes.com/upgrade.html, to get the discounted price.
If you already own a Pocket Tunes 3 Deluxe Registration Code, then simply install the latest version of Pocket Tunes to your device and enter your Registration Code. (see this Knowledge Base article for instructions on entering your Registration Code)
For instructions on using Pocket Tunes with some of the more popular online stores, please see these Knowledge Base articles:
For Yahoo Music, see this Knowledge Base article: http://www.normsoft.com/kb/idx/0/139/article/
For Napster, see this Knowledge Base article: http://www.normsoft.com/kb/idx/0/117/article/
For Rhapsody, see this Knowledge Base article: http://www.normsoft.com/kb/idx/0/138/article/
For general information on transferring audio files to your Palm, see this Knowledge Base article: http://www.normsoft.com/kb/idx/0/188/article/