I actually have always wished for an assisted OTF knife. I have seen a few of the few of the small Microtech UTX 70's at shows, and it would be the absolute perfect work knife for me. It's a 'double action' OTF, which means I think that you push the button one way to open it, and the opposite way to close it. When you push the button (more of a switch) you preload the spring, which then fires within a fraction of a second. You push it the other way and it retracts, also under spring power.
So the great thing is that it's both auto-open and auto-close. I find that with most knives, getting it out is quick enough, but putting it back tends to be slow and awkward. At work I like to be able to get my knife out quickly, use it, and put it back quickly.
However, I decided that I can't risk using an auto at work, even one with a 2 inch blade. It would just take one co-worker to get mad at me, run to HR, and tell them I've got a switchblade. Bye bye job.
If it were assisted, however, it would be legal and would be perfectly ok under company policy.