All depends if you have Any interest in Getting your Mini site Creations "High-up" into Google's Search engine Network or Not! ...

Definitely! ... Do your Homework "extremely" well...

Apply Caution...

To those almost "Dying" (type) of business model(s)...
http://linkvanareviews.com/the-micro...or-just-harder

Study & Listen to Google expertise! ...

Especially "Smart" Video related niches... Tactics & Biz models...

As per Google's recent Farmer related Update(s)...
http://www.seobook.com/google-kills-ehows-competitors
http://www.seobook.com/in-my-algorithmish-opinion
http://searchengineland.com/who-lost...m-change-66173

Quick Brainstorming for Whatever! ... 24/7/365...
http://www.seomoz.org/popular-searches/index/2011-03-27
http://www.turboscout.com/
http://www.whonu.com/

Phil