Here’s an RSSreader for Blackberry. This has a much better UI than FeedBurner, another Blackberry RSSReader. Setting it up is still too complicated, especially for non-BES users, and it is still buggy, but it has potential.

I’m looking for good network visualization tools.

Not sure if this interface I really want, but the data is enlightening in a number of ways.
theyrule shows the interconnections among the board members of Amerca’s largest companies. Regardless of your politics, there’s something of interest there for everyone.

Be sure to check out the “load map” option and see some of the connections that people have reveal.