Can anybody share it? a list of do-follow social bookmarking sites, so we can compile one solid list here...
there is no such list. how many dofollow sb sites are out there as of this date is beyond anyone's guess and no way someone can compile them all in a single list.
There's no point trying to submit to all of them. Just get a largish list of a few 100 and sort them by homepage PR, traffic, and size.