Just happened to me!

Luckily I have an external charger already. I've just uninstalled midnight commander to reduce the chances I’ll be tempted to tinker and require a reflash.

I've done a fair amount of soldering in the past but looking at how utterly tiny the connections are I doubt that even if I obtained a suitably fine soldering iron I'd never have a steady enough hand. Sadly I may not be a member of the n900 club for much longer :'(

http://twitpic.com/696607