Thanks 5teve. I'm actually doing pretty good right now. I got out of the hospital on Sunday, but my mother and father pretty much kidnapped me and are making me stay at their place until I recover. :D LMAO! Hey, although I'm going stir-crazy from the lack of things to do, I can't complain too loudly though. :D
If you open up the options page for CIFS (click the wrench icon in the services page, right besides the switch to turn CIFS on and off), you can change some options for CIFS. Scroll down to the bottom of the options and you'll see an option to turn on AIO mode (asynchronous I/O). Turn it on. just below that you'll see two fields for the read and write buffers for AIO. I tested it by copying a large 20GB folder back and fourth between one of my desktops and my FreeNAS server. I found that for my system, 10,240 was the sweet spot.
There was some other options I enabled in the Aux parameters, but i can't remember what it was off-hand. To be honest, the biggest difference I saw was with increasing the read/write buffers.