I'm curious how you decided to add Classic/Nano support? Easier? Or do you see more requests for them? Isn't the iPod Touch pretty popular?
iPod Touch and iPhone both are very popular. The primary reason why MC12 folks were able to support Classic/Nano was due to the efforts by linux iPod developers - who cracked the hashing mechanism for the database in the Classic/Nano. iPod Touch and iPhone both have completely different hardware design internally which makes it a lot harder to "crack" and hence almost no third party applications work with them.
That said, you can still use MC12 to manage your music and use iTunes to sync them to iPod Touch or iPhone. There are ways to do it without allowing iTunes write access to your media files. I wrote about a couple of different ways of doing this in this forum sometime ago.
Osho