I've been working on SocialGrapple for a few months (since stepping down from imoveyou.com, YC2010S), this week I got the core product to the point where I'm proud of it so I want to show it off: http://socialgrapple.com/

I wrote up a blog post with some screenshots that will get you an idea of what SocialGrapple looks like:

"SocialGrapple snapshot: @limedaring's social graph growth after her HackerNews publicity" http://shazow.posterous.com/socialgrapple-snapshot-limedarings-social-gra

Screenshots: http://i.imgur.com/OzTIb.png http://i.imgur.com/tghcT.png

The gist of it is: I pull the account's social graph every night (soon to be every hour) and do a diff from the last known state, then create an event log based from that. Then I do a bunch of graph operations like intersection between following/followers to determine stalkers/stalking/mutual, annotate the feed with metadata useful for skimming/ordering/filtering, intersecting two accounts to see how growth relates to somebody else, etc.

Backstory: I built Tweepsect some years ago (http://tweepsect.com/) which lets you intersect your followers/following as it currently is. It's still one of my most-used projects, and a lot of people were asking for more like support for larger accounts, data over time, charts (a lot of people use Webnumbr to track their follower count over time), track who unfollowed them (qwitter and similar stopped working months ago). This is where SocialGrapple comes in, with an angle on competitive intelligence too.

I would love some feedback. What would it take to get you as a paying customer?