Mine arrived yesterday, they were shipped about three weeks ago.
Haven't done much with them other than to check they work and see if they fit in an Apple wireless keyboard, which they do, and you can get the batteries out afterwards too. The end cap screw protrudes a milimeter or so out though due to the added cell length. The same applies to the Apple wireless trackpad, although unlike the Apple keyboard, the trackpad is less demanding in quiescent state with cells lasting months.