forget scanners,if you have full frame, buy a macro lens (second hand 2.8/90 Tamron if you're on a budget) shoot at f8,in RAW,100 iso,focus with live view,and the quality will be amazing,and the workflow much easier.
I've heard of that method, but couple of factors for me:
1) I need to put together a good setup, and get a film holder that holds it quite flat. Generally I've seen the setups as vertical to the ground.
2) The negatives and polaroids are not of the same aspect ration of my dSLR, so I would have to crop it in various ways.
3) No matter how precise I am, I probably will have a teeny tiny mis-alignment every time I set it up. Even though f/8 might have everything in focus, a tiny angle other than perfectly parallel to the sensor may be visible.
4) I have to buy the bits I need to put it all together, so the cost might end up being non-trivial, although maybe not as much as the v600 it might not be to horribly different.
5) I'm not a poor starving student. I can afford to spend a bit of money on this.
In terms of workflow, I'm not sure how much easier it actually will be, at least for me. I can easily mount the film, set my parameters, click scan, and play a video game or read for the next 5-10 minutes until it's done. 1 roll of 120 film is 10 frames, so if it takes me 2 hours to scan a couple of rolls, I'm OK with that. I'm not a high volume shop. I'd need to spend some time in Photoshop regardless because the colors and such might not be good, and I may even need to adjust by channel whereas with proper scanning software it gets much closer right away as it knows a lot more about the source that it's reading.