A qualified list of micgroblogs to find market intelligence

Today I wanted to start a list of micgroblogging services. Before I started I stopped! I instantly realized that an unqualified list would be a waste of time because it already exists. If you are not afraid of a huge list visit the Top 250 list of twitter clones sites. 

I therefore plan to compose a qualified list that offers microblogging tools to assist companies in finding market intelligence easily and focused.

Thanks for any suggestions and keep you updated. Don't expect the list immediately it will take some time - be fair with me!