...and no one else telling me. The new Dell Axim 51v is out, it has six or seven different reviews published already, and no in-depth coverage of its WiFi abilities. However, I do know more than I ever needed to know about its battery life (improved due to use of more nonvolatile flash RAM), display capabilities (largely unchanged), and new OS, Windows Mobile 5 (as usual, pseudotechies think backing up old OS data should automatically migrate to new OS formats).
Having read the reviews -- Engadget has a collection of the reviews in one of their blog articles -- I can say it's probably the PDA to get if you're buying new today and have the extra cash. Strapped for cash, you might consider an Axim 50v and spend the savings on a microDrive (or food, your choice).
To corrupt Erasmus: "I spend all my money on gadgets; if there's anything left over, I buy food."
-BrAp