I will be pushing release 2.73 very soon. It lets you move the lead-in ad block closer to the page header, and the lead-out block closer to the page footer. It is a fairly complicated change, so do let me know if you find anything amiss.
I am also thinking of diversifying to other ad providers -- ClickBank to begin with, because it can co-exist with AdSense. I will use the donated ad slots to display my ClickBank ads (and possibly my own ads to sell my books, promote my blogs etc), if it is okay with my users. Later on, if there is enough interest, I will release a new plugin (possibly called More Money) for you to monetize using other ad providers.
The ClickBank code is included in this V2.73 release, although it is not turned on. It will become active in a few days, in release 2.74, depending on your feedback.