RSS Reader on your Blackberry (or Windows Mobile)
I recently found a new RSS Reader, viigo, which works on my Blackberry. It's easy to install, and it just works. It comes pre-installed with some existing channels, which you can remove. You can also add more through browsing a list provided or by entering your own feed URL. You can also go to the viigo website and add feeds through their interface, including importing an OPML file. viigo also supports three aggregators: bloglines, Google Reader, and My Yahoo!.
I find this a great way to keep up on news while waiting around, whether for a meeting to start or an appointment. No longer do I sit and be bored reading last years issue of Time or National Geographic; I now have easy access to content I am interested.