Well to let everyone know, as I've seen this question asked a few times. When are they updating? To be quite honest, I've noticed a trend in the last 2 updates. They tend to update within the middle of the month. I mention this because don't you find odd that you were able to order NBA2k9 in Sept., which is street dated for Oct. 7? If they updated in the beginning of Sept., it would've only included the month of September. But since they updated within the middle of the month, they are able to include some of the new games the next month.
As the reason why they haven't updated in a timely manner, I honestly do not know. The fact they are updating is a bonus for me, because I thought they didn't until it was mentioned. It keeps us coming back and doing ads for them, which is a bonus for them. I mean they probably have to hit up a contract with Amazon or any other company to get the titles in. Or maybe they don't have enough staff to keep up because of the other offer sites they run, like the Ipods, PS3, TV, Camera, etc.. I'm not trying to post excuses, just trying to shed some light on the matter. Everything in due time. I'm just happy that for doing something relatively cheap, I get a $60 game, I'm willing to wait. Because before I wouldn't pay no more than $40 for the game, I'm sorry, if the 360 dropped in price, why can't the games too. $60 is a lot for a new game, and is definitely why I really like this site and what everyone has done to help one another.
With so many games coming out this fall season, I won't have nearly enough time to play them all and the ones I've picked up recently. So, I'm enjoying what I got
As for the question on what new trials to do. You could experiment and try it out, wait for someone to do it and let us know or check out the first page for anything new that you haven't done, usually below the post, it lets you know when it's edited. Rig and many other Cags have helped out compiling what they went through and if the trials are worthy or not. If there is a specific question on the reliability a trial, you could search within the thread. If there is no answer to your specific question in mind, then by all means post.
hope this helps

and happy gaming