Ask HN What Web App Would You Like to See/Need?

My problem is I have yet to find a web app that's lacking for my own needs. Tons of news sites, tons of tech sites for questions. This brings up a problem with trying to find a project to dig into.

So, what web app do you want to see happen? What niche, or need do you have that is not currently solved? The bigger the better, and the more interactive the better (I really miss doing heavy JS, so the more interaction needed, the better). Finance is not really my area of expertise, but anything outside that I can consider and think if it's feasible.

The main reason this thought came up is being out of work (You don't hire a Ruby guy and then say "Hey, make this PHP script, Magento, go fast on two servers so it can handle 1000 concurrent requests") I have nothing really exciting to do. Figured I could kill days while looking for a gig with screen fulls of pretty colored code.

I want to build a super-simple webapp that works like a mad-lib, preferably based on excerpts from Hitchhiker's Guide, in order to hang vocab on memory hooks, using the Greek mnemonic method. User enters a bunch of nouns/verbs/adjectives/adverbs to remember, and the app replaces them into the excerpt. User reads the passage a bunch of times, and the weirdness of the words in the passage helps to give the words some context when remembering them. [Example below]

I'm not a developer, but I built this thing in vb.net reasonably okay. It's really meant to be a webapp though, and I'll bet a lot of language learners would use it.

Wanna design/build it together?

Example

  This 은행 has — or rather had — a problem, which was this: most of the 고양이 living on it were 날씬 for pretty much all of the time. Many solutions were suggested for this problem, but most of these were largely concerned with the movement of 큰 pieces of 숙제, which was odd because on the whole it wasn't the 큰 pieces of 숙제 that were 날씬.

So, what would you ultimately like to see? A reddit type interface to talk about open source projects, with perhaps ties into Git/Github etc?