I myself have a 64MB memory card as well (chinese clone card, now working with FMCB 1.8, thanks jimmy).
I also have a 512MB USB Stick which only contains my apps (lots of space free)
The reason I bought the 64MB card was because I got fed up with copying the savegames everytime using ulaunchelf.
having a memorycard with tons of free space surely beats having to swap around savegames with ule. And it even was half the price of an official 8MB Card!
But it also has its disadvantages. A few games I own do not work correctly with the 64MB memory card. The Katamari games do not recognize the card at all, REZ seems to be prone to savegame corruption and GH III loads and saves very slow to this card (~ 2 minutes each). Luckily, for those I still have my original 8MB Card!
if anyone can show me a (dedicated) app that can juggle my savegames between memory card and USB Stick in a very similar way like the PS2 Browser does (showing the icons and names of the games, simple 2 click copy process to copy over etc) , i'd be thankfull though. But unfortunately ulaunchelf is a little bit complicated with this (after all, it's not a savegame manager, it's a filemanager serving a whole different purpose)
just my 2 cents
PAL V14 SCPH 75004PSTwo, fully working, XenoPS
PAL "magical" V4 SCPH 35004 PS2, 160GB, dead DVD laser, exploited
8MB official sony MC (Slot 1)
64MB chinese clone MC, Free MC Boot 1.8, Independence Exploit (backup mod) (Slot 2)