I like Phil and Jon's advice (not that the rest of you haven't offered great advice).
Gradually build. Go up Sherman. Some people feel it has exposure on one side. It's similar to Quandary excep the ridge is more narrow. You can easily stay away from the steep side though, but occasionally "flirt" with it.
Then go for something like Castle that has a little more once you gain the ridge. You could then take a trip just up to the keyhole or shortly beyond on Longs Peak.
My whole thing was how in the world can I climb some of the harder 14ers when many of them have loose rock? I haven't done Snowmass and Capitol in ages and so now I have to get reacquainted with exposure. So this is my plan for 2009 (and you can see this on my peak list under the climbing connection forum here). Capitol by the way was exhilarating, but also the scariest place imaginable for me. I may go back again for grins someday.
First a straightforward ones like Antero, finish Castle, and San Luis. These are would be ice breakers to get my initial acclimation for the season and gauge my endurance for some decent mileage in a relatively safer environment.
Then Challenger, Kit Carson, Sneffels, Wetterhorn, and Uncompahgre to get a good taste of exposure, but not terribly bad. I know the Crestone group is known for solid rock, Sneffels and Wetterhorn have a short 100-200' section. Then if comfortable I can then graduate with Crestone & Crestone Needle both with relatively solid rock compared to others.
Come 2010, I can then venture on ones like the Wilsons, Maroon Bells, Pyramid, and Little Bear to at least go as far as comfortable or at the very least stretch my comfort level a bit. In the end there's a chance I may not summit these, so that would limit my to checking off 50 out of my list of 58?! I'm OK with that. I would love to climb all the 14ers, but it's not a do or die requirement for me.
So build on it, challenge yourself, but go for the solid harder ones when your ready. It's bad enough to get wigged out from exposure, but multiply that with a slope sliding out from under you.