I noticed from surfing around

I noticed from surfing around a few sites mentioning "sxsw" at daypop, there are a lot of people here I haven't met yet. I kind of wish there was some sort of wireless application to solve this problem. I have my bookmarks stored on my laptop. Many of those bookmarked people are here but I don't know what they look like. What if we could send out little pings of our url, and whenever someone within your list was within 50 feet of you, you hear a beep. Getting closer to them, the beeps would begin repeating at an increasing rate. Then you'd find those people.

Or something like that.