In today's bad market, the $10 call is 15385 vs 2470 put at $10. overall, about 27800 call in the $7.50 - $11 range; and 12000 put in the 7.5-10 range. This is for today's call vs put data, I don't have the whole month's data. But I read some where a while ago the call vs put ratio is 3 vs 1. I don't know if the data mean anything. If it mean something, there got to be some good news release on/before May 15, 2009.
Good observation, May 10 calls were very active. Hopefully with good reason and not wild speculation.