I'm digging this thread and bringing it back up to introduce the new fallback nodes list on bitcoin.it.
The list is parsed by a mediawiki bot every hour, and nodes are checked (are they up, are they up to date, etc).https://en.bitcoin.it/wiki/Fallback_Nodes
Explanations are given on how to add your own node in the list. I'll add the ability to poke tor nodes to the bot later. Nodes which are down for more than 24 hours will be removed from the list.