So I have no actual web development or pluging development skill, but my friend helped me hack a cool little feature into my wordpress blog. It can be viewed here:
It's an addition to the sidebar inviting people to come hang out. When I'm logged in I have a popup menu of all the locations I've loaded into the database (i'm doing this manually at the moment) and I can set it to display where I am. I have my building, a couple of coffee shops, and a 'no location' option in there at the moment. Click the 'what's this?' link for a better explanation.
Anyway, I want to share this with the WP community, but I don't really know how to make a plugin, or if it even qualifies as plugin material (being that I had to put some code into the sidebar file of my theme, the wp config file, and add a table to the database). But if anyone is interested in looking at the code and trying to make something more official out of it definitely email me or post here.