The variant rule for Apprentice-level characters was dropped; I expect this was because that there wasn't room - it has been mentioned by the WotC designers that some variant rules had to be cut.
I'd look for them to reappear in Unearthed Arcana when it comes out.
Mark - I've used them, and they're fine. At 2nd level, your character is almost exactly the same as if he'd progressed in the normal fashion.
The only exception is a Ftr1/Wiz1 (or similar) doesn't have the benefit of the +1 BAB for choosing feats at 1st level; similarly with a couple of other pre-requisites, hardly mattering at all in the long run.
Cheers!