It's a safety issue.
Ever tried to unplug your dryer from the outlet? It's not easy like a 110v plug.
Now lets assume that you get a 220v plugset like you can get for the Tesla...but it now has a J1772 on the car end. Then assume your wife/daughter plugged into a weatherized outside 220v outlet...and it's raining. Imagine those smaller fingers trying to get a fast grip on the plug because they're getting wet...and they accidentally touch one of the blades in the process. 220v + rain = Zap = never touch it again (once they get off the ground).
With ~25 manufacturers getting in the game to make Level 2 chargers (http://www.pluginrecharge.com/p/evse-vendors.html
), the prices will melt once quantity starts ramping...so the high price today is mostly an early adopter "fee".
Given that probably everyone on this board is an early adopter, you know all about this (Damn, the 60" Sony LCD monitor I bought last month is on sale for 30% off! Bastards!)