I still am strong about the definition of a site being 'sandboxed' is for it to not rank in the top 3 for its unique company name. So for my corporate site not to rank number one for "rustybrick" that would mean my site is sandboxed. Of course, people argue with me, but since this site was one of the first (if not the first) to capture the name "sandbox" from a thread at WebmasterWorld, I kind of can claim that the definition is what I stated above. Enough about the true definition.
There is a fun thread over at WebmasterWorld named How many MIA sites are there?. It might be healthy to let it out in that thread. :)