I'm kind of in a unique situation here where I have my own product (and a great one at that - /shameless plug) but I'm still lacking a sizable mailing list to bring to the table for my side of the bargain for JVs.
I've done a few experiments with PPC, but my experience with Adwords -> squeeze page has been pretty bad. For starters, the CPC cost is, as I'm sure many of you are well aware, sky-high for IM-related niches. Even with bids as high as 80 cents to a dollar, I still only get a few clicks per day.
I was thinking of trying article marketing on a large scale next. Outsourcing massive amounts of articles and then distributing them to hundreds of article directories using isnare or article marketer.
But what would you more experienced folk recommend for building an IM list? Specifically, what worked for you guys during the initial stage?