Maybe you can copy them from your SD card to your hard drive and then try to import them into iTunes (iTunes will probably convert them to another format). If that doesn't work, use Windows Media Player to burn the tracks to CD, then import to iTunes.
I'm not an iTunes user; but I do know that there's quite a few DroidForums members who sync their Droid's with iTunes through an app.
Actually, there's a handful of iTunes to Android sync apps available in the Market.
These are simply three apps (of possibly more) that I found just doing a quick search for the keyword "iTunes" over on AppBrain (which reflects the same apps that are in the Market!!)