Mobile-Review.com has written up an extensive review on the HTC Blue Angel GSM Pocket PC Phone with thumbboard (otherwise known as XDA III/MDA III/Qtek 9090). I'm particularly impressed with the versatile software bundle it comes with.
pocketnow has a review of the iPAQ rx3715. In traditional pocketnow form, they take pictures of the device from every possible angle, and then some. They also have screenshots of the NevoMedia software bundle that sets the 3715 apart from other Pocket PCs.
All three are fantastic reviews, so check 'em out. If anyone wants to buy me one of each, I wouldn't mind. :mrgreen: