Recording internet radio?

[Lellu]

There is a interesting prog-show coming from YLE (BBC of Finland).
(In case you want more information about it check this: http://auralmoon.com/forum/showthread.php?t=3292)

However the boadcasting time is problematic for me (0.05-5.00am) and I thought about recording it.
So could someone share his/her wisdom with me and tell how can I record internet radio to my computer (Mac OSX)?