Okay here is my workaround for the charging issue in gingerbread
The first thing you will want to do is stop the confliction between the BME&sleep function to this go to settings, application, development and tick the box net to stay awake.
Now for the locking confliction this is not perfect but its better then nothing
The second thing you will want to do is go to settings, display settings and click on screen timeout and set this to the highest especially if your battery is nearly flat and needs a full charge.
The third thing you will want to do is optional in terms of if you are going to be using Android whilst the phone is charging you can skip this If not please follow thank you
Okay so you want to leave the phone charging but the locking mechanism will kick in after even the highest value of screen timeout.
So what I do is go to settings, about phone and click on status and leave it on that menu and also please note you must use the phone or make an action after say 25 minutes as otherwise after 30 minutes Android will lock the phone and the confliction between BME&locking mechanism will happen and Android will kill charging the phone.
The BME is obviously not fixed in gingerbread as this is still happening.
Anyways these are my two cents to the problem and take this issue with a pinch of salt thanks
Also you can help the speed of the charging along by changing to a stationary wallpaper and not a live wallpaper and also changing the display brightness and turning of all wifi and phone GSM/3G connections if you are not using these functions, I hope this helps