CiteSeer: Acknowledgement Search
Well that's cool. One of the uses is to find funding agencies... in this they're not alone. In fact w/biomed topics funding is all important as NIH now has the public archiving (encouragement) policy. See, for example, the
MeSH Research Support. DTIC, NASA and DOE tech reports have contract number, corporate author, etc. Anyway, it's nice to have it for journal articles and conference proceedings.