JRIH  Anybody try this on OS 5.8, I sure can't get it to work. Keeps asking for a plugin, when you go to the website, I can't find it.  
(Version 1.50)

ANOMIA  Thanks , this and XLD are my go to apps for music! Couldn't do without...

They are the best!  
(Version 1.50)

ZEPHYRIS  This app is a life saver. Not sure why it doesn't have more reviews. Been using it for a long time now. No complaints, thanks dev.   
(Version 1.50)

BIDULE  Works on 10.4.10 too. Thanks !  
(Version 1.50)

ALJUK  PPC 10.4.11

I've just converted a couple of albums from wma to mp3. The app was simple to set up, has a slick interface and worked flawlessy. The resultant files are perfect. 10/10.  
(Version 1.40)

LANOUVELLECHAIR  Universal Binary please !

Thanks for this great toy.  
(Version 1.32)

JWW  I tried this tool myself when I was looking for an app to convert WMA to MP3 or AAC. In searching different tools I came across this review from Dave Taylor (http://www.askdavetaylor.com/convert_mac_wma_audio_files_to_mp3.html).

I found this app extremely easy to use: just select your files or folder and a new audio file format and convert.  
(Version 1.1.3)