We've fixed the crosspostin problems that happened after we updated our XML-RPC library (it handles the communication for crossposting to LJ and Blogger). Apologies for the problems.

Update: it looks like LJ is still broken. Will fix this ASAP.

There were issues with login over the past 14 or so hours due to an upgrade that I had to implement for 2.1. They have now been resolved. Apologies for the downtime.