If you think of your typical RSS reader or widget as a stream, Viigo is a river delta.
Unlike many services that feed headline news from a from a preselected widget or manually-entered URL, Viigo--available for BlackBerry and Windows Mobile--gathers news channels into a dedicated client that looks great on your phone. With some saving and functions similar to e-mail, and an extensive library of additional news sources, the free application is the most complete RSS-reading environment for smartphones I've seen so far. Tune in to the video below to get a taste of how Viigo can simplify and extend your collection of mobile feeds. An unlimited data plan, by the way, is a must.