If I had to come up with 21 I'd add USB charging but I know they can't fix that with software so I'll suffer through. And don't give me some crap about voltage....the iPad has a USB charger - yes one end is their 30 pin icrap, but the other end is standard USB. Also - the Nook uses USB to charge.
The iPad and nook can barely manage to charge over USB. In fact, my nook to standard AC charger can't even maintain, much less charge. When connected to the computer, it does not charge at all. I needs to be connected to it's own AC/DC converter, and have it's own proprietary USB port (needs to be longer to have more charging pins). The XOOM's battery is massively larger, so even that probably wouldn't work. The iPad has a 30 pin, again, moto could have done that. But then you would complain about a proprietary plug.
"Some crap about voltage" is just not accurate.
#1 Yes it does charge, but the skinny design is prone to breaking off. It's just a matter of time.
My netbook has the exact same pin, a pin that has been tossed into bags, smashed by massive textbooks, stepped on, kicked, etc for two years. Not even bent.