deadsea - 4:25 pm on May 2, 2012 (gmt 0)
Up until about March 26th, Googlebot had been crawling 30,000 to 40,000 pages on my site per day. Then it abruptly switched to crawling a more consistent 10,000 pages per day since. You folks must have been allocated all that extra crawling that I'm not getting now.
Actually, I launched tons of international language content right about that time on various sub-domains on the same server. Its hard to tell from webmaster tools, but it may be that Googlebot is spending more time crawling that and less crawling my existing content.