Gathering information

Alright...I hope I can explain this clearly. Currently I have 15 blogs under my multisite...all with various plugins. However, I would like to access info from the e-newsletter plugin for all the sites. First off, would I be able to do that without having to access each site? How easy or difficult would that be?

What would I have to do to create a sortable section for admins? I would eventually like them to have the ability to gather information of certain fields that were completed in the regisration form.