Other new features include backup of bookmarks, many calendar improvements, easier email search (as well as many other email improvements), louder default ringtone, MP3 purchasing from Amazon, support for JPG, BMP, and PNG formats, file downloading from the browser, and many more. Check out the entire list here.
To purchase apps, you must enter your credit card info. From the official PR:
"In preparation for e-commerce in the App Catalog, to purchase apps, you can enter credit card information by selecting Preferences & Accounts from the application menu in App Catalog. Credit card information is stored with the Palm profile, not on the phone. You can choose whether you need to enter their Palm profile password each time you make a purchase, or for the first purchase in any four-hour window."