Typical working hours:
IRC or IM networks/handle(s):
Two or three paragraphs describing your project -- what it means to accomplish and how it will benefit MediaWiki or Wikipedia.
We don't just care about your project -- you are a person, and that matters to us! What drives you? What makes you want to make this the most awesomest wiki enhancement ever?
You don't need to write out your life story (we can read your blog if we want that), but we want to know a little about what makes you tick. Are you a Wikipedia addict wanting to make your own experience better? Did a wiki with usability problems run over your dog, and you're seeking revenge? What does making this project happen mean to you?
It should be possible to break down your project into some bullet points describing particular features or milestones which can be reached individually. Consider that we may wish to roll out the system for testing when at an intermediate stage of completion, and that time estimates might vary, leaving you with more time than you expected or (more likely) a lot less -- some features can be pushed back if you end up short.
If time permits
Try to break your deliverables into "milestone" points which can be reached in sequence. Block out your estimated schedule of when you'll reach each functional milestone. Don't forget that real time may change -- leave enough wiggle room for your required features to be completed!
We don't just want to know what you plan to accomplish; we want to know how. Briefly describe your work style: how you plan to communicate progress, where you plan to publish your source code while you're working, how and where you plan to ask for help. (We will tend to favor applicants that demonstrate a clear vision for what it means to be an active participant in our development community)
Past open source experience
Do you have any past experience working in open source projects (MediaWiki or otherwise). If so, tell us about it!
Any other info
If there's other relevant information -- UI mockups, references to related projects, a link to your proof of concept code, whatever. There are no specific requirements, but we love to see people who love what they're doing. Show us you're excited about this project and have an interest in the background and are considering how best to make your idea work.