The price of SD cards is just dropping week by week, as newer and larger models are produced. This is the cheapest that I have seen yet for a branded 2GB card, including delivery. It is £24.99 from amazon, including FREE super saver delivery.
These are just so handy to have a spare, when you are taking your digital camera on holiday with you - you can be snap-happy, and not have to worry at all about deleting and storing your pictures.
Details: Stores up to 2GB of digital data, Compact portable storage drive, Compatible with Digital Still/Video camera, MP3 Players, GPS systems, PDA/Handheld PCs, Fits any lifestyle, Plug and Play - No driver installation necessary, 2 year warranty.