Using OnLive reminds me of using first-generation wireless mice with dodgy sensors and a rough signal.
One minute, it's tolerable. The next, I feel like I'm sliding the mouse cursor through molasses on a chilly winter morning. Could be network congestion on my end (or on OnLive itself), but I'm honestly not a fan. It feels too inconsistent for serious use.
I won't rule out that it's on my end, though.
As for FTL: it's not bad. The demo is time limited, but you get to move around to different planets (some of which have shops, others have random encounters or events) and fight baddies. You can collect scrap that's then used for upgrades, loot weapons off of your kills, and send your crew around to repair damage etc.
You can open airlocks to vent fires into space, which is sweet.
Each time you use your jump drive, the Rebels expand deeper into the system (from left-to-right in the two sectors I visited), represented by a red circle. If you do anything inside that circle, chances are good that you'll run into serious firepower. I managed to survive long enough to get away, but sustained pretty huge damage from being so outgunned. Answering a distress call after that caused my death (didn't have much choice in answering it, that planet was the only "safe" one outside of the bad guy's territory at the time).
I'll play with it more later. I think it's fun, definitely something a bit different. It's about what I expected, and I mean that in a positive way, but I'm hoping there's enough roguelike spirit to keep it from becoming repetitive. I'll probably buy it.