WMA to OGG?

What tool can I use in SUSE10 to convert WMA files to OGG format? My kid ripped a ton of cds for me, a couple years ago, to WMA format. I'd like to convert all of those to OGG so that I can play them in Amarok. Is there a preferred tool for doing this? Or is there anyway to play WMA files in Amarok? P