Just noted today: an adventurous map blogger makes the following bold statement:
For a while now, we’ve thought to ourselves: wouldn’t it be great if there was some place on the web where map collectors could get together to compare their collections and discuss map collecting? We decided to stop thinking and start doing! Show Off Your Maps is a website by map collectors, for map collectors. We’re here to give collectors everywhere a place to discuss the wonderful world of antique maps and to show off what they’ve got. There’s only one rule: have fun!
That was from the (so-far) one and only post; it apparently has just been opened, so if anyone’s of the mind, this is something one can get in on the ground floor of.