Configurable key bindings are a nice touch. Other than that, what does Twitch offer that I can't get from quicksilver?
Also, I like the feel of the web page as a lander, but I really wanted to get more information about functionality and maybe configuration instructions - are these available somewhere?
What I never liked about Quicksilver (and I really liked Quicksilver) is that I always had to look at it. I never knew if pressing "m" would get me Mail, Mozilla, or "Mail selected file as attachment". Quicksilver was often too smart and tried to do too much.
I have Twitch bound to my Option key, so I know that I can tap Option, then hit C, and I'll get Chrome, every time. It breaks my flow much less, and it's faster, to boot -- I timed that I can get Twitch open, use it, and have it closed in 600ms.
As to a more informative website: I'm considering this a minimum viable product, enough to get on sale and get feedback (like yours, thanks!). More everything is on the way.
As a launcher-only effort, I can definitely see the value in the key bindings. My hesitations remain:
1. It seems that you must manually configure twitch when a new application is added (although I'm not certain if it defaults to something for new apps...); whereas Quicksilver automatically indexes your applications.
2. You add key bindings, but lose the additional functionality that Quicksilver offers in its plugin system (sending mail, opening a web page, etc.).
3. Quicksilver is free.
All of these things considered, you have one major advantage - Quicksilver is not in the app store (and I don't see it getting there). You'll want to check out Launcher though, as it will be your primary competition and it has a lower price point.
Also, I like the feel of the web page as a lander, but I really wanted to get more information about functionality and maybe configuration instructions - are these available somewhere?