Here's a product some of you might find interesting, although I have to admit it's probably not too far off for DIY makers to craft up their own version. The Magnifty is a large Magnifier attached on 15mm rails magnifies the image on your LCD to help you get better focus. Other products like the Cinevate Cyclops or the Jag35 MonitorX offer the same method of magnifying the image into a large view, but attach directly to the camera's LCD.
The Magnifty uses 15mm rods to slide forward or back to adjust the magnification, and also offers a much larger view. One major benefit to using such analogue techniques is that you know you're getting the proper exposure and color from the camera's LCD than you would with most cheaper electronic Monitors. Of course if you work indoors, you don't have to think twice about it, but for outdoor use you should be cautious of your equipment. Check out the Magnifty at their eBay store following the link (click here).
Magnifty LCD Viewfinder Magnifier 15mm Mount