Correct me if I am wrong, but can't you just use an adapter? I have a micro SD to Mini SD adapter that I use for my HV20, and it works great. Micro SD cards are awfully cheap now.
That's definitely an option, but I've had situations where the adapter wouldn't work (just have to test it to be sure). The ideal scenario would have been for Canon to engineer it as a micro SD slot, but such is not the case. It might be worth snatching up an adapter or two since it is a viable option per James' suggestion. Just an FYI, there are 2 GB Mini SD cards available on Tiger Direct's website.