Mango,
to get around this problem..is a pain in the ass, but after you rip the WMA onto your computer, use Window Media Player to burn a regular music CD. After burning that CD, the copy protection is gone and you can rip that new CD using any program, as many time as you want, into any format you want....
If you don't want a coaster... use a CD-RW.. if you don't care since CD-R are cheap nowadays... then.. have fun