They're on the right track, but this year they can save themselves the trouble and just publish a list of employer/cities for all their graduates. While what they put up for the Class of '07 is certainly better than a pie chart it still has the ability to mislead, especially regarding expected starting salary. The average reported starting salary only includes about 60% of the class. Over 200 students with varying levels of debt graduated from the class of 2007 without reporting their starting salary to the school... and that omission should be cause for alarm until a credible explanation is given. A much better (and easier) way to display employment information is to just list where every graduate found work, and then let prospectives determine the value of the jobs for which no salaries were mentioned. I would expect GW will follow suit and get that out this cycle for the Class of '08. The really forward-thinking schools should be publishing lists of where the Class of '10 found work for our 2L summer, since we are the first group to be competing in a noticeably smaller job market. Any data from before our year is misleadingly going to paint a better picture of what actual job prospects are currently looking like. Until schools start publishing the lists online, it's entirely up to prospectives to use their acceptances as bargaining chips in requesting comprehensive employment information, and then share with each other whatever you get back from them.
Note that Vanderbilt didn't send out a list of everyone's starting salaries last year; all they did was show where each graduate found work. Prospectives (now 1Ls) then went and cross-referenced the list with NALP and firm website data to get the salary info. Schools can still package up the stats and publish them in ways that highlight their strengths, but they shouldn't continue to do it at the expense of transparency.
And the only copy I have of the Vanderbilt employment spreadsheet is an old one on google-docs... but if you call out for JeNeSaisLaw he'll probably swoop in and deliver.