I am seriously thinking I need a dual-monitor set up. I have found that I can have the grading system open in multiple tabs or windows. This means that, with enough monitor space, I could have the grading open in one spot while having the discussion submissions open in another. Side-by-side. This would also make grading the comments easier, as I have to create grading columns for them in Blackboard (for the blogs, it's set up while you're setting up the blogs, and the gradebook column will thus pull up submissions in the blog forum).
I've been thinking about this since last semester, when I used my netbook to type papers on, and my office desktop for the internet (browsing, using google book search to find page numbers, etc.). I think it's about time.