Couple of questions on a similar subject:
1) Will the Google Analytics code work with non-JS E-Junkie buttons?
(The reason I'm having to use non-JS buttons, is that the JS versions screw up the look of the WP theme I'm using)
2) Or is there some other way to track sales of the same products, physical or otherwise, from different sites? Other than setting them up as different products for each site, which kind of ruins the point of inventory tracking etc.