Right, this goes out to all of you who couldn't get these cards for their Nokia 770 at the time. The 2GB DAtawrite RS-MMC cards are back in stock at BurnMedia at £7.47, unfortunately delivery takes that up to £10.99. Don't know if there are any ways you can reduce the shipping, but they are in stock so if anyone needs one then go for it!
MMC cards also come in a smaller form factor, of about half the size: 24 mm × 16 mm × 1.5 mm. This alternate form factor is known as Reduced-Size MultiMediaCard, or RS-MMC, and was introduced in 2004. RS-MMC cards are simply smaller MMC cards; by using a simple mechanical adapter to elongate the card, an RS-MMC card can be used in any MMC (or SD) slot. RS-MMC cards are currently available in sizes up to and including 2 GB with 4 GB models announced but unavailable.