Linux Format Magazine is running a contest to get your idea implemented in Mono. The contest goes like this:
Get your dream application made! In Linux Format issue 89, our Mono cover feature includes a competition called Make it with Mono, where you design your ideal piece of software. Just jot down your suggestions, and in April other users will rate them -- if your entry makes it into the top 30, you'll win a cool Mono T-shirt. And if yours is the number 1 rated entry, it will be programmed in Mono!