I dunno; I'm in the middle of a three day slump producing the worst stats since I started with AdSense in 2005. I went all the way back and didn't find numbers like this, and this normally my top month. I'm starting to think something is going on with my account. At least my domains and affiliate ads are doing well.
My traffic is reasonably good, and impressions are going up today, just not clicks.
EPC strong unexpected growth (+20%) compared to July 2007. eCPM flat. Daily revenue still down, though, but not as much as in the beginning of 2008. Now, if Google could please just fix the conversion rate issue (USD-EUR) which really really really is a PITA.