On Facebook, I set my settings to pull posts (saved items) from Delicious and Google Reader. It's set to show that I posted on either of the sites as part of my regular Facebook feed.
However, for the most part it doesn't post any new saved items from either of those feeds. It seems rather random as to when it decides to read that there are new items on either of those services, and then for them to actually show up on my Facebook. When it does appear, it seems to take weeks (if not months) worth of saved items and posts them. By the way, I do save bookmarks on both Delicious and Google Reader on a daily basis.
My question is: Why is Facebook so slow to pull any newly saved items from Delicious and Google Reader?
It seems that the one way I can get Facebook to see that there's something new is to manually update it by going to Options->Settings->Stories Posted by you->Imported Sites, and clicking on either of the links to Delicious/Google Reader, and clicking on 'Update Now'.
Best Answer
Facebook's feed pulling system, to be frank, sucks. It's gotten slower and slower for no apparent reason, though I assume that the upsurge in users has resulted in large increases in server load. That's the only reason I can think of.