For example see this page I made for the "iSEEM2: Environmental Niche Atlas" project that is a collaboration between my lab and the lab of Katie Pollard at UCSF (supported by the Gordon and Betty Moore Foundation). To do this, I registered a new account in ImpactStory (with the first name i and last name SEEM2; using an alternative email address I have). I then used the "upload individual products" and loaded up Pubmed IDs, DOIs, Github web addresses, Slideshare web addresses and more. And Voila I get I nice page with Altmetrics for our project rather than for myself.
Now I have not loaded everything done on this project yet, but already this is a helpful way to post results from our project and look at some of their metrics. I also updated the website for the project: http://iseem2.wordpress.com.
I think making such project specific pages will end up being useful in many ways. I discovered one this AM in an email I got from Impact Story. I have appended it below. Turns out they give weekly updates on how your metrics have changed for that week. This is the best thing I have seen regarding "Alt Metrics" anywhere. Very very useful. Still not sure if this is an "acceptable" use of ImpactStory but I figure they should be OK with it.