Well, after the LOLery that was the
$225 weta figurines which included beta passes, it now appears that Gamestop/EB are doing a beta promotion - all you have to do is
pre-order a copy online, and beta access is included. Open beta has been rumoured, but it'll probably be a weekend-only stress event if anything. All of beta appears to be a short stress test/tweaking, given that it only has a month to run. The game is releasing on October 31st.
While it's clearly a Diablo clone (its by the Diablo devs for chrissakes), this game is shaping up to look like an MMO in all but name - it resembles most a Guild Wars or DDO, no "shared world" but lots of MMO features like an auction system, guilds, much heavier quest focus than Diablo, etc... partying is also much more important, though the game does still offer offline play. Complete with $10/mo fee, though you can let your subscription lapse and can still play the game, without access to all the frills and such. There's a ton of detail on
this wiki.
There's quite a cloud of uncertainty surrounding this game, but I think it'll do very, very well, esp. since theres a bit of an MMO slump right when they're releasing. (wtb ZA & sunwell)
edit: well they've gone and redacted everything with a 17th date on it, looks like it'll be delayed a week...