Open beta was opened on the 1st may onwards through fileplanet (registered account needed) believe it was around 50k+ signings/keys available, sure that more will be available also...so it being a closed beta now...is really under scrutany...or however its spelt. I know at least four people who've registed into fileplanet and gained a beta key since the 2nd..so looking like may still be available.
13gb download...isn worth it my end, through my connection....hence the waiting for the initial release..
..any other things, memoryleaks, servers up and down...to me is basic, beta level stuff..which is expected. To be honest, servers are up and down even now in
WoW...and thats been out from beta for plenty of time.