As, i use reddit daily and submit and vote up many interesting stories links. As, a result this indirectly update my friendfeed account. Friendfeed receives the update from your reddit account and publish it on your profile on each single vote up. The things which i like the most while vote is that, I vote up the links of the reddit "pic" section and the link shown in the ff is with the thumbnail of the pic . So, it is very fast to vote up the rediit stories and this causes a huge update on your friendfeed account.

I saw many people are using digg on their friendfeed profile but digging is not as fast as reddit vote up.