Responsive Screen Captures
Stephen Hay gave a presentation at Breaking Development Conference in Orlando on Responsive Design Workflow. Hay stated that he would refuse work if it involved delivering Photoshop comps. His process instead involves building sites in code and delivering screenshots of the site to the client for approval.
If you are designing in code, previewing in the browser and capturing screenshots to deliver to the client for approval, there are a few tools that help out a lot in the process.