just to put my 2 cents in, I think once the volume of EVSE's manufactured overseas goes up, third party cloners wil become interested in copying them, and by then the most expensive part, the actual male J-1772 male connector with the attached #8 gauge cabling (for up to 40AMP EVSE's), drops in price, then the EVSEs will drop as well, since that component and the attached cable is the single most expensive component of the EVSE. There wil probably be portable plug in 240VAC EVSE's available mid 2011 to late 2011 in the $350 or so range, that's my best guess. The Volt SPX unit is already priced at $495, just not available to other than Volt owners yet...
and yes, there is a %50 tax credit availble in 2010, so sure, if I could get one I would, but probably not too likely right now, but again, as time moves on, these will drop in price enough that the tax credit will not really be much of a factor.