I can say that when installed the Palm Touchstone wireless charging is the bees-knees!
I had it on a N900 with broken USB port and while it is tricky filing down the charge control board to fit inside a Mugen cover with a double Scud battery it is worth is in the ease of use. Clunk and charge overnight, dead easy and no worry about falling onto the USB cable.
If there were a way to trick the N900 charge system to accept charge without shorting the data pins it would be possible to have everything soldered easy internally to USB pads and show charge state just as if you had a USB cable plugged in. I have never gotten an affirmative answer from our charging and USB expert Pali on if this would be possible so I assume not.
http://talk.maemo.org/showthread.php?t=56950

Wonko above is the guy who put a dip switch on his data pads to internalize charging, but I am a big lover of USB host mode and this is inconvenient as having to reboot to use Android apps in Nitdroid. I prefer we come up with a software fix like we did in HEN and later USB host mode manager, still hoping for a OSS Alien Dalvik for the N900 too to avoid unneeded reboots.