Regenstein should have more free scanners and Adobe software.
The 4th floor art reserve area is often booked, and on the days that I've been on campus I've had trouble finding time to scan / edit pdfs for classes that I'm teaching.
Generally, we direct patrons who need a scanner to the nearest photocopier -- all our copiers have the ability to scan to a PDF (and other formats). We admit there is a charge for this service, but it's quite minimal: 2 cents/page.
In addition to Art Reserve, the Map Collection on the 3rd floor also has a flatbed scanner. We believe that users working with maps have priority on this machine, but if the machine is free the staff welcomes users working in other areas.
Unfortunately we don't have a site license for Adobe products and are unable to deploy them on Library workstations (except for Adobe Reader). However, you might check out the CSIL lab in Crerar, which has Macs equipped with Adobe Creative Suite (Acrobat, Photoshop, Illustrator, and more).