Just in case you haven't heard of any Indian Social bookmarking sites, heres some that I came across:

1.  www.Indianpad.com - seems to be the most popular with very simple design though sometimes it can get a little confusing.

2. www.Rambhai.com - started by some IIM grad, looks good

3. www.chalo.net - again a very simple design, seems to be very new, but the thing I like about it is that it also has a forum (though empty) which in the future could be a nice way to interact with people visiting the site.

There are many more but, these are just the few I can remember of the top of my head right now but, none of them seem to be as popular as their counterparts in the west. On the other hand social networking sites like orkut and matrimonial sites seem to be very popular... does this have anything to do with the way Indians use the internet and what we perceive its purpose to be?