Sansa MP3 player users - some questions

Not to derail this thread into a Sansa pitch.

I have a Sansa Fuze with 8GB memory, with an 8GB Micro-SDHC chip.

Using Explorer, I’ve noticed that it makes a distinction between internal memory and external uSD card. So far I’ve kept all my music in internal memory. Do I need to worry about how I copy my music in, or will it be invisible?

Love the player, and especially the FM radio, but the proprietary interface bothers me. Is there a way to get this to dock with something that expects an IPod interface, or am I stuck using this with headphones/earbuds? And I use “stuck” in a mild sense. Like I said, I’m very happy with this player.

I’ve used RealPlayer to organize my music into genres and albums, but I’ve noticed that some of the information got changed when copying it to the player. (In all fairness, I’ve just updated the firmware, so this may be a bug that has since been fixed). Is there a better media organizer that keeps my music information and playlists the same when copying?

Thanks.