The Microsoft Exchange team is holding a contest for those helping others in the community.  This includes on blogs, forums and the Exchange Ninjas Wiki.

What are the rules of this contest?

• Email a URL to your 'proof' to ehloidea AT microsoft DOT com.  You must include your snail mail address, shirt size and email address in your submission in case you win, so we don't have to do a lot of work to dig that up later.
• The 'proof' must be available somewhere on the web anonymously - we want to link to the winners in our followup post and help drive traffic to other exchange community sites as well.
• Multiple submissions are OK, but it'd help us out if you'd include them all in a single comment/email.
• We will accept entries for at least two weeks from today.
• The number of winners we select will depend on the number of submissions, but we have enough swag to do 20 "honorable mention" care packages with at least two items in them, and one each of a third/second/first/grand prize package with several cool items in them such as funny t-shirts we made for the product team for key milestones in the Exchange 2007 development cycle

 More details on the contest can be found here and here.