For completeness, and as a followup after all the 'deleted immediately' assertions, and to keep the 'nothing to hide' crowd happy (that their images *will* inevitably end up on the web):
Reg 12/1/10 : US airport body scanners can store and export images
Full body scanners at US airports can transmit digital strip search images of people, contrary to US Transportation Security Authority assurances.
According to the TSA procurement specification, v1.02, 23 September 2008, the scanner, termed a Whole Body Imager (WBI) will have "a high capacity read/write drive... to permit data uploads and downloads." It will also "provide capabilities for data transfers via USB devices" and support both Ethernet and TCP/IP. Field reporting data for up to a year will be stored on the hard drive.
No indication that I can see of the capabilities of the ones to be used at UK airports but it's unlikely that the machine functional specs would be much different.
[ It's not normal practice to post followups once something has been moved into this section - but the apparent disparity between the announcement and the facts did seem to warrant it in this case. And no, this isn't a call for further additions... ]