I love this idea. Good implementation too, the only thing i'd change is:
1) Add an overview page with a much bigger list of ideas.
2) Decrease the font size a bit. I could only see two or so ideas at once on the home page.
3) Perhaps add a voting system of some type?
You also might want to seed it with a bit more content, otherwise you'll have a hard time breaking out of the chicken and egg problem (that's what ended up killing me).
EDIT: I'd also add some indication that you aren't going to tweet as me.
Voting and tagging are on my roadmap. I'm working on seeding it with more content too (just posted an idea myself!)
As for your comment in the EDIT - does it make you think you're going to end up tweeting your idea without a chance to opt out? Currently it doesn't tweet anything out if you comment or submit an idea, so if that's not clear I'd like to improve it.
Nothing about your site indicates you'll spam me, but plenty of sites do. I am, and i think a lot of people are, reluctant to log in with Twitter without some reassurance that they and their followers won't be spammed. Just a quick note can't hurt imo.
I'm planning on doing that eventually, but it will be opt-in with a big TWEET THIS checkbox next to the submit button. Do you think that will be clear enough?
I Love the idea (it does sound familiar..), just a couple nitpicks:
1. Please don't make me sign in with Twitter. Not everyone has a twitter account and not everyone wants to give you access to theirs.
2. I'd like to be able to rate ideas right from the leaderboard. If i'm just browsing and i see an idea i think is excellent i'd want to be able to tell them that.
3. The design struck me as a generic blog design. I'm not sure exactly what it was, but it looked like a generic wordpress blog at first glance.
I like that idea(heh), maybe in addition to categories? So you could select "View all tools in python" or "View all apps in javascript" or just "View all apps"/"View all ruby".
1) Add an overview page with a much bigger list of ideas.
2) Decrease the font size a bit. I could only see two or so ideas at once on the home page.
3) Perhaps add a voting system of some type?
You also might want to seed it with a bit more content, otherwise you'll have a hard time breaking out of the chicken and egg problem (that's what ended up killing me).
EDIT: I'd also add some indication that you aren't going to tweet as me.