If your users are heavy emailers and note takers, one device you might want to check out is the Sidekick 3. Danger's new PDA and phone boasts both a trackball and a comfortable keyboard, along with an MP3 player. The one drawback is that the device, which retails for about $300, doesn't have terrific phone capabilities. You have to do a lot of flipping to make a call--initially swiveling and flipping the display up to access the phone keyboard and then flipping the screen shut to actually talk. Yet the voice quality tested well and there are a bunch of nice add-ons for communication needs such as a calendar, an address book and the ability to save photos. Review