I think a TC post is worth nothing to most startup unless
1. you are targeting thier audience
2. you are after hype to get some VC's interested
3. you are targeting a mainstream audience and hope that other bloggers or mainstream media will pick you up after seeing you on TC
You are better off targetting blogs aimed at your target audience.
A blog with 2000 readers is going to have more value and be easier to get coverage on.
Anyone know of any where that list these b and c list bloggers by niche? I would pay for that list.