So, I'm in the process of submitting Greenback's baseline greenhouse gas inventory, as called for under the ACUPCC . AASHE has supplied an online tool  to use in filing the reports for academic years 2001 through 2007, and it's pretty straight forward. Even if your school hasn't (yet) signed the PCC, you can use the same link to see the publicly available reports filed by the schools which have.
From an administrative point of view, there are a couple of minor glitches. The tool asks for emissions from purchased steam separately from those for purchased chilled water. Makes perfect sense, but the most widely used calculator lumps the two in together. Additionally, there seems to be no reporting tool to allow schools easily to verify what they've entered before hitting "publish to the world." (In later years, when we're posting one year's data at a time, this may not be a big deal. Right now, when we're posting seven years of data all at once, it sure would be convenient.)
Still, for a first-time effort (after all, it's only the charter signatories who have to report their inventory results by 9/15), it's pretty straightforward. And it feels good, checking off a BIG item on my "to do" list. I'm just hoping that the basic level of functionality and straight-stock user interface will mean that, on 9/15 when every administrator at every charter signatory is trying to get on at the same time, the server(s) don't run out of gas.
Oops, I mean "sustainably generated electricity".