i not really know the actual answer but here a few share of what i use
bookmarking
article submit
directpry submit
press release submit
web 2.0
forum posting
blog comment
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i not really know the actual answer but here a few share of what i use
bookmarking
article submit
directpry submit
press release submit
web 2.0
forum posting
blog comment
I am only aware of forum posting and blog comments,therefore I will go with it.