some should. look at it like this:
memory: anything that you want to always have on (at least most of the time) and will stay running when your phone goes into hibernation.
Ex. BeeJiveIM, gyrator, callerutility, etc
storage card: anything that you don't use that often and want to start up manually.
Ex. Skyfire, Google Maps, Music ID
---anything that you want on a storage card i would recommend you putting on there BUT sometimes things you want to load onto your storage card only will download to your memory.