If you have a valid library card, and your libraries have books on tape to loan digitally, you can download books and listen to them on your Storm (probably all other BB also). Our libraries have a connection to Adobe Digital Edition and I had to download (free) Overdrive Media Consule. This allows you to transfer the books to your Media Card on your Blackberry. Works great and the price is right (free) You can "check out" the books for up to 21 days from the library at which point they are gone. Our library allows up to 8 books out at a time.
I found the link on the Sony Reader Bookstore down at the bottom. This linked me into the library syatem on Adobe...very cool.