There is no formal way of tracking usage directly in eduCommons. It may be a possibility in the future. If you would like to help us further this along, feel free to contact us directly at email@example.com.
In the mean time you can also get this information from the web logs. Depending on your needs you may find that awstats, webalizer or google analytics may provide you with some relevant information. Or you could easily write your own script to parse out the url portion of the log entries and tally access there.
The main reason that eduCommons does not keep track of this information is that it is not an LMS and does not track end users via login. All end user access to eduCommons is anonymous, and all content is freely available without user registration, which makes the content much more visible via search engines, web crawlers, semantic web and metadata harvesters. The downside is that it does make it harder to get very specific access information.