First of all, this is something I've got in the works...
Also, something called "QExpo" is happening in the week (and a bit) from July 20th - 29th. The idea is to revive a bit more interest in the good old Quake. here is a description of the original idea, and over here is a discussion board where most of this is being organised.
Shambler has decided to run a mapping contest to see who can make the best "natural terrain" based map. Basically you have to make a map which is at least 75 percent natural terrain as opposed to man-made structures. Check the TeamShambler news page for more details (look for news posted on Tuesday, May 1st).