No offense Homebrew, but I just spoke directly to Fox about this and they said the Float, Vanilla and Talas all share identical uppers&lowers and the switch would be no problem, I even confirmed it with a service technician because I wanted to be absolutely positive (Mmmmm all black Talas). The tech I spoke to said that a few of them have assembled their own all black Talas's for their personal bikes.
The only problem for me, is I have to have a Fox service center perform the task because the Talas air spring internals are not user servicable, but from my understanding the Vanilla/Float swap should be easy for anyone who can service a fork.
Fezzy I suggest you get on the horn to Fox @ 1-800-FOX-SHOX and talk to a tech, If its anything different from what I just said please report back to this thread and let me know ASAP. I just ordered a Talas & Vanilla and if Fox lied I'm going to do some Fox hunting (with a fork in each hand)
manic mechanic.