I've been checking in on this on imdb.com for about the past 12-18 months after initially hearing the rumors, it kept saying it was in pre-production and there were no details. I'm surprised they're actually going ahead with it but more power to them! I understand Spielberg is directing and Lucas is involved in writing which is good! Also, I've heard that Sean Connery is a definite "no" for this one. there's a rumor that Karen Allen (from Raiders) will be in it, it also lists Cate Blanchett, John Hurt, Ray Winstone and Jim Broadbent as part of the cast.
Oooh really looking forward to it! I wonder if Harrison Ford will do many of his own stunts like he said he's done in previous installments?