Some of you may laugh at this idea, but I've been using Microsoft FS 2000 to learn morse code. Just locate the aircraft at various airfields in your area, tune in to various VORs and NDBs in your area (on your sectional chart), and listen to the broadcasts. The airnav.com website also has a list of radio aids, along with the usual AFD (which I don't have). An AIM/FAR has the morse code chart, so with this, a nav aids reference and Microsoft FS 2000 (or 2002) you're in business.
BTW, I've found that FS 2000 is useful for a few things, like learning morse code, learning the basics of how to capture a VOR radial or an ILS, practicing some cross country with nav aids, learning the basics of GPS navigation, stuff like that. It's actually quite useful for practicing certain aspects of IR training.