I'm amazed at the high average donation this time around. IIRC the last few Humble Bundles I bought into had an average of around $2. At the time of writing the average on this bundle is $3.98. I guess these games offer pretty good value.
Depends on when you buy it in the bundle's lifecycle, too. I know the average for the last Bundle I bought (before this one) was like 4 or 5 when I purchased it. I was glad to drop 10 bucks on it at the time. This one? I had Uplink already, on disk. I'll GLADLY buy it again, get all the other things, and so on. And I got source code? Well freaking awesome. I'd say these Bundles are awesome. They're cheap enough I don't even blink, and they quite often offer much more than one would expect.
I got the one with Baird, Revenge of the Titans, etc in it before this. Just a tonne of fun. I don't play the games every day, but they scratch an itch when I feel like toying with them.