I'm testing 1.4 on my server. To join, tell me you'd like to join in the comments and i'll tell you the IP in the comments. One other reason why i'm doing this is to see if my port-forwarded IP works, how many slots my server can have, and so we empirians can have some 1.4 fun!
Had some trouble with the IP and port, I think its fixed. Opening up some server details in the PM now, tell me if you have any problems logging in.