Says late November here in the UK, boooo!
I can live with the wait though, wasn't even remotely tempted by a wifi version. The mini will go everywhere with me. Plus, I've always regretted getting a wifi 3rd gen, unlike the 3G versions I had on previous iPads. Tethering sucks balls, absolutely destroys my phones battery life. Didn't really matter so much when I had my iPhone 4 as my Mophie Juice Pack took up the slack, but the lack of Mophie for the 5 (currently) is killing me.
Plus, I miss the spontaneous browsing you can do with a cellular iPad - tethering requires a few extra steps of preparation. I suppose if data sims cost a fortune where you live tethering is the better option, but they're absolute peanuts here in the UK.