Did this apply to everyone or just yourself? Or did the 'unusual items' you were carrying mark you out for 'special attention'?

BTW if you replace the SD card with the micro SDHC cards (now available upto 8 Gigabytes), these are a lot easier to hide to get through TSA checks. Just pop one underneath a sticky plaster wrapped around a finger for example.

http://www.amazon.co.uk/SanDisk-memory-microSDHC-MobileMate-Reader/dp/B000WH6H1M/ref=pd_sbs_ce_4