Ask HN: Various "Make Contact" sites for HNers

ADDED IN EDIT: I'd like more HNers to see this, but they won't if it doesn't get more upvotes. I don't care about the karma - feel free to find some of my comments and down-vote them, but I'd appreciate it if you'd upvote this question.

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I know that there are several sites and services for making contact with other HNers, or plotting where they are. Having said that, I'm building another.

I know, I know: http://xkcd.com/927/

I have an itch to scratch, though, and it's not just finding HNers. It's actually independent of that, there doesn't seem to be anything else like it, it's something I need, and maybe other people will find it useful too.

But here's my question:

If you know of an existing "Map these users" type of application, site or service, can you let me know in the comments? Commentary on what you think of it would also be nice.

Thanks.

ADDED IN EDIT:

Here are the ones I know of, although I have no idea how current or active they are, that's why I'd appreciate comments:

http://hndir.com/

http://hnhackers.com/

http://hackrtrackr.com/

http://www.hackernewsers.com/

http://cofoundergoogledocs.com/

There are also these spreadsheets:

https://spreadsheets2.google.com/ccc?key=tk7rUIb-2aPdk_5gFJE...

http://spreadsheets.google.com/ccc?key=tFgepUuuBHSgfeuKPKccx...

http://spreadsheets.google.com/viewform?hl=en&formkey=dE...

http://spreadsheets1.google.com/ccc?key=tJ4MdE7OPPucXtJAAKda...