Hi,
This would apply to bloggers who digg all of their posts:
If I stuck to nofollow social bookmarking sites, and socialbookmarked every single one of my posts (2-3 per day), could they still cause a penalty in Google?
The reason I'm doing this is because I don't want to use social bookmarking sites for link juice (which is why I'm sticking with nofollow sites), but rather for actual exposure.