The achievements don't take up much room. Look to the save files.
I believe the path is something like
Console - Memory - Hard Drive - Games -
and you'll get to a list of files organized by the game they're associated with. Be aware that when you delete them you'll lose your campaign progress and save files.
It'd be interesting if they included at least an add-on in China. I'd also like to see something in the North West, like Washington (for the geographically confused, I'm referring to the State). I seem to remember stumbling across a rumor on the wiki that one of the devs let slip a hint that it might be in the deserts again. Actually, I think part of Fallout's Sino-American war took place in China's Gobi desert, so I guess it's possible the game WILL be in China. Kind of doubtful, though.
I've only been a member for a year, so I don't have the perspective to comment on any change in shipping time. I will say that their claims that the post office scans the games and notifies GameFly they've shipped before they arrive doesn't seem to hold water.
What? My friend just got this game on the 360 and I'm renting a copy tonight. Last night I was in a party with him and another friend, and they ran through part of the campaign and, to my knowledge, shared loot, much as he and I did in the demo. It's 4 player online, last I checked, and I played the demo with him for about two hours without getting out of the introductory aspects of the campaign. Reviews on Metacritic are borderline, but as a fan of the genre that's enough for me. I'm fairly enthusiastic about it.
That's really your call, but Revelations is about as safe a bet as you can get when it comes to quality. They're cranking sequels out, but Ubisoft has one of the largest (if not THE largest) international teams of developers in existence on the project. The game will undoubtedly be beautiful, the action will be fluid, and the plot will be intriguing with good voice acting, if a little convoluted.
The only issue with the game is whether you feel it has enough replay value to be worth the money. That's a matter of your personal taste, but with the expansive worlds we've come to expect from Ubisoft and the promise of an improved online offering, I'd be surprised if anyone regretted buying the game.
Old world blues was supposed to be released in June, but since we haven't heard any updates (as to a specific release date) in over a month, I'm guessing it's been delayed. Unlike some previous New Vegas DLC, it was supposed to be released simultaneously on all systems. However, the schedule for releases over the PlayStation Network has been derailed as a result of Sony's recently compromised security and subsequent shutdown. I'm guessing Bethesda is contractually obligated to release Old World Blues simultaneously on all systems, meaning that Sony's delays are effectively Xbox's delays as well. We'll probably hear an announcement sometime in the next couple weeks detailing a delayed release in July or early August.
Also, watch me get 5-8 thumbs-downs from haters with no lives, despite the fact that this is a well-written answer and I'm probably right.
GameFly doesn't have enough distribution centers, so shipping often takes 3-5 days. They also don't have enough copies of games, which is complicated by the fact that precedence is given to people that add a game early, and some people manage their account vigilantly enough that they've probably got 2012's early hits in their queues already.