I've got 100% reliable charging finally..... Here's a posting I did to the local lug

One of the biggest problems with Nitdroid (I'm currently running N12 Umay) is that when the screen turns off charging stops, so if you leave the phone running Android plugged in overnight, you'll typically wake up to a dead or close to dead battery.

However looks like I found a solution, by setting the screen off from the default of 1 minute to 10 minutes, it appears to be charging properly. It continues to charge even if you press the power button.

Still doesn't resolve the other issue of Android not recognizing a full battery when the current one is almost dead. If you power off the phone, put in a fully charged battery and boot into Android, it will say the battery is almost dead and automattically power off. If you then boot into Maemo, it shows a full battery and works fine.

Workaround is to, while in Maemo, plug in charger and reboot phone into Android, it'll start charging and then seems to reset the battery level in Android and then you are okay. Still testing this a bit though as there are some edge cases that I still have to suss out.