I know this question is ancient, but I played as my main guitar for several years, a G&L Legacy modified with a Speedloader bridge and nut, and I loved it. To this day I am dismayed that Floyd Rose ditched the entire enterprise. You had great tuning stability without the need for Allen wrenches or the need to master the zen of tuning slightly below pitch before tightening the screws, then adjusting with fine tuners after: a total pain that I always hated. With the Speedloader, not only did you avoid that, you didn't even need normal tuning machines at all: just pop out the old string and pop in the new one, and only adjust the fine tuners. It was awesome!
I feel the downfall here was Floyd Rose's marketing: he wanted to sell guitars and not just the bridges, and he didn't license the bridge to anyone else... no famous players got behind it because they couldn't put it on their brand signature guitar... therefore string manufacturers didn't get behind it... it's really too bad because the concept was great and the execution was great too. I mean: it really worked and worked great! But it just got buried because people poo-pooed the special strings. Call me nuts, but special strings vs. Allen wrenches to change normal strings? I'll take the special strings any day of the week. I'm sure I'm not the only one: there would have been enough of a boutique market to continue the operation indefinitely, but Floyd Rose sold out.
Now that it's all history, I play non-locking trems. I still hate the Allen wrenches... but I'd go back to a Speedloader system in a heartbeat.
PS, the string-through Floyd-style trem sold at GuitarFetish.com, along with the Tone Vise locking nut is something I may check into... it looks close to the ease of the Speedloader.