Galaxy on Fire 2 THD
This is a graphics rich, fairly immersive RPG/space flight sim (I've only played it for a little bit, so I don't know how far the gameplay goes). It's a THD, or Tegra Zone, game, and it's free for any device with a Tegra 2.
The controls can be a little wonky until you get used to them, but I think some fiddling with the setting/experience at the helm will fix that right up (wish it used a Wiimote classic, though). Gameplay is fun and not too redundant (so far), progression is pretty straightforward with freeplay quests on the side of the storyline, and it's freaking gorgeous on the Streak 7.
Did I mention free? If you haven't downloaded this yet, do yourself a favour and get on it. It's a great toilet surfer, if you know what I mean.
The only downside I've encountered thus far is that it's locked up on me twice, requiring a hard-reboot (that and the first time I tried to download it it crapped out halfway, but that could have been my T-Mo signal). It's probably fairly RAM intensive; I'm going to try killing apps before I run it, next time (something I usually avoid like the plague on FroYo+ OS). I've only run it on the stock ROM, so no idea if this plays well with StreakDroid or HoneyStreak. I also have yet to hook this up with the HDMI dock, but I'm looking forward to doing so.
This game, more than any I've yet tried, really showcases the awesome of the Streak 7. I was playing it in the hospital yesterday (friend having a baby), and the family there are all Apple people; iPhones, iPads, etc. They were all asking what the Streak 7 was (I had to find a polite way to say, "it's like an iPad, only better in just about every meaningful way").
I didn't realise this at the time that I wrote this, but the game is not free. It's free for a limited amount of gameplay, but then it costs to purchase the whole game. It's pretty awesome, though, graphically; so it might just be worth it for you. I haven't decided if I'll purchase or not because the darned thing keeps locking up on startup (requires a hard restart for the Streak).