Maybe it's just some West Coast lag, but this appeared very early this morning Eastern time (Sunday night, this was still a pointer to the OLPC G1G1 program page).
I'll check back when I regain consciousness in the morning. Maybe they'll be for sale then. I'm thinking that Amazon could at least take a cue from Apple on their store updates, though.
Update at 8:25, Monday morning Still not available...I'll check back at noon when the left coast wakes up.