Amen to that, Ted. Aim for a specific niche and grow from there. It could be local (e.g. your city or region), or targeted to a profession (Edublogs, anyone?), or some other specific category (e.g. running clubs). Mix and match and go from there...

Tung: Freemium has the benefit of giving people a way to try out an unknown product without making an up-front commitment (aside from their time). Put a fee in the way, however minor, and you're increasing the friction. Now they're not just taking the time to try out your service, but they have to take the extra steps of making a payment.

TL;DR = Embrace freemium but narrow your target market to start. :)