I'd go with SD for the larger capacities and lower prices, but stear clear of SDHC / SD 2.0 cards - chatting on #maemo the opinion is definately that SDHC / SD 2.0 cards won't work as there is no kernel support. Online in the UK you can try the following (I'm not recommending these firms btw, as I've only ever used Expansys myself in the past) Moby Memory My Memory Expansys