Hellgate: London is supposed to be released this summer (June/July), and I've just found this nice little sneak-peak on a Norwegian IT news site:
http://www.itavisen.no/km_fil/9/2297869.wmv
As a (former) Diablo 2 fan I must say that this one looks very promising, and I look forward to trying a demo version of it.
Hellgat: London is supposed to have at least 40+ hours of gameplay, but it could be up to 100 hours if you decide to explore more than just the main plot.
Official Hellgate: London site:
http://www.hellgatelondon.com/ 