Marketing Help for VOIP services

I would like to run ads (text and banner ads) in ad networks like google/adbrite/tribal fusion/kontera etc.

Since i am providing VOIP services what type of site should be targeted so that i get high ROI.

thanks

 

Ethnic communities with a high presence in the US.

 

Djrishi,

Let me know if you want to advertise on my PR6 VOIP Blog- All targetted google traffic. it's a fastest growing VOIP blog. Feedburner featured blog.