Hello, This is what I got in my Webmaster Tools yesterday (check image blow)... I uploaded more pages (78) to the already indexed (73), but 1 day before I notice the "indexed" pages have dropped to zero.
If you recently updated your blog then it will take time. I' also suffering from this. But in my case, my bandwidth is filled & this is the reason for my blog to be not indexed.
It's a site... not a blog. Indeed I got scared that they did something bad to my site. No reason, can't see any reason for that! Anyway, I will check later, hoping that it will recover. Just found it wicked: looked like it's a crash.