I discovered this by accident the other day.
I searched for "dayofjen pinterest" (my internet handle is dayofjen, in case you didn't know)
And I didn’t see my pinterest account, weird.
But 4 results down I did see:
Sorta obsessing over pinterest: http://pinterest.com/jennyst... @starpadilla @projectaudeo @Michellepire · January 10 from Twitter - Comment - Like - Share.
It appears that my Twitter fed my FriendFeed so Google was able to see what I wrote on Twitter indirectly.
So, I think I accidentally discovered the secret to indexing Tweets – allow Google to see them through an indexable 3rd party website, such as FriendFeed.com. So, even though my Tweet about pinterest didn’t index and rank, it was still published on friendfeed which ranked instead.
*Note: Facebook is also non indexable, so if you are trying to index your Facebook posts, sign it up to feed a 3rd party website that is indexable as well.