For what it's worth, I've received numerous in the past few months from floor clerks that have lost/anticipate losing their jobs. Most have few, if any, skills that are transferable to an upstairs role, be it trading, risk, etc.
Having said that, as already mentioned, if you are going to do it, you want to get on with a group in options, better yet a group that is not only making markets on the floor, but in OTC (Clearport) products as well, as the floor guys that are going to survive are going to be the ones that successfully make the transition to making markets in OTC products. A few have already made this transition and are now doing more off the floor than on the floor.