TL has a netbook mode, lol. It's gonna be lightweight.
Heh, the netbook mode is available even in the Mac version of the game...
For the most part I get no slowdown with all settings on full, unless there's a lot of transparencies on screen all at once. Then performance crashes and burns rather bad with sandy bridge graphics (crap framebuffer bandwidth, I suppose). Still, it's not so bad it becomes unplayable, and it's a quite enjoyable game too if one just overlooks its faults (like the wonky skill system, too many and hard-to-judge weapon stats, too prolifient and too random and mostly utter shite loot, way too small stash and so on.)
I'm really looking forward to TL2, hopefully they've fixed these quirks by then. Also, they've promised a Mac version as well, which is great.
Characters are stored on your local machine not online.
It supports Steamcloud, or Playsteam, or whatever the FRAK! its called.
I know, coz I've seen it synch after exiting the game. If it's not uploading my save files, then whattaheck IS it uploading...? I can't think of anything else worthwile, you can't even change the key bindings in Torchlight, so the settings aren't worth duplicating across machines.