What’s Your Google Disaster Plan?

blog on blogspot .. if you have use so called blog promotion software then I would say that is the reason. Is this what you did?

Don't panic, (use any promotion) and you could, may get back your listing.. but this could take some time, (3-6 month).

Read Google reinclusion request and Google banned and reasons Google banned

Also see Google Webmaster Tools and Google Webmaster Guidelines

How to submit a reconsideration request for your site Video tips