Eligius does not require registration, you just use your bitcoin address like below. The stats are currently being changed so they are currently not working. During the transition you need to look at the stats page on your miner to confirm you are connected and view your mining speed.
http://eligius.st/~wizkid057/newstats/userstats.php/{put your bitcoin address here}
Thanks for your reply.
I have been using my e-mail as logon, not bitcoing address. Is it all lost if I change to bitcoin address?
As has been stated in here by the OP before, if you mine to an invalid address or something that isn't a bitcoin address, he keeps it as donation, and wont stop you from mining.