Posting a job or recruiting a student does not represent very much, and is quite deceiving by HBS (as riverripper observes).
PE & HF do not turn up on any campus - there are too few people in the shop to spend time on that. As most jobs are obtained through networking, it is a much trickier game to get through without being introduced to people. As MSDay and Ripper noted, there will be little variation between what the top schools post.
HBS will have quite a number more opportunities, as they have alum that clearly only recruit at HBS. 2008-2009 numbers will be very interesting when they come up, but I guarantee that the 2007-2008 will cling on for some time on their site and never be available for direct comparison.