I don't think I'd want to flood my social network with the truth about what I'm actually doing either; someone who finds the fact that I've cleaned my toilets or vacuumed my lounge interesting is probably not the sort of person I'd want to be social with.

I wasn't going to flood them with updates for every task, but whenever you get an achievement or level up.

In http://kuwest.com you have more quantifiable tasks, so you can complete a quest when you, say, run 100 miles or read 1000 pages.

If they're big impressive things I can see people's desire to brag coming into play.

As a disclaimer, I'm somewhat of a Luddite when it comes to this stuff so the fact that I'm not enthused should in no way count as a strike against it; I'm not a fan of foursquare et. al. but they seem to be going very well.