http://www.xbox360achievements.org/news/news-3358-Mass-Effect-Updated-to-1200-.html
The available gamerscore has been updated by 150 points. Doesn't sound like there's THAT much to it but Bring Down The Sky was a bit of fun and was nice and cheap for 400 points, with any luck the same will be true for this new casino thing.
No formal announcement or details on whether it'll be out for PC at the same time (or ever) but most of the time these point updates or achievement lists are about 2-4 weeks ahead of the release

After reading the Most Disappointing Gaming Moments, no one here will buy it. I would've if I had Xbox Live or a decent gaming rig instead of my work laptop...OOH Steam finally installed Half-Life 2 on me computer. Better go get Age of Chivalry and that co-op mod.

From what I gather, Bring Down The Sky has a hidden authentication limit and no revoke tool. Not that that matters much, really, because my Mass Effect revoke tool doesn't even work.

Personally I thought it was a great game, an excellent blend of RPG and 3rd person shooter with a story that, whilst cliched in many ways, was delivered in one of the most immersive experiences I've ever had in a game.
Frankly I think a lot of the hate directed at both Mass Effect & Fallout 3 are from people afraid of change

You've got me excited! I actually really liked Mass Effect!

Wasn't bring down the sky integrated into the PC version? I seem to recall endless bitching that PC gamers got stuff for free that the xbox gamers had to pay extra for

Fixed.

I liked the fact it felt like a live movie, except with better acting and intense shoot outs.

The last one was free for the PC (and included the patch, though the patch was available stand-alone as well - you had to register at the website to get to the link for BDtS, while just the patch was available to everybody) but cost points on the Xbox, so I'm hoping the same will be true for this one as well.

Wasn't the PC version delayed a few months and thats why Sky was free?

That's more than I know.

PC games get free shit like that because of all the hardware we have to buy, in which Xbox360 or PS3 or Wii owners have all that they need usually.

Well, we also miss out entirely on other stuff, like the epilogue to Prince of Persia and the two extra chapters for Tomb Raider Underworld.

Meh, not my favorite games but Price of Persia lost all its charm when he got the Dark prince. Fucked the story for me and felt like he was more of a rage mode than a gameplay element.

Hate to break it to you, but software companies don't gives a rats behind about the hardware you have to buy. The reason BDtS was free, was because the PC version came out after BDtS was released and they wanted to give the PC Gamers "something" for getting the game so many months after it was released on consoles when it was originally going to be a simultaneous release.
I wouldn't be surprised if we're charged for this new one though.