What are some of your Ska favourites of all three waves?
I've many but here's:
Justin Hinds & The Dominoes/Carry Go Bring Come
http://www.youtube.com/watch?v=qqn-BJc1I2c
Pressure Drop - The Specials (yes there are many version of this song, written by Jimmy Cliff (sadly I've still not seen The Harder They Come)).
http://www.youtube.com/watch?v=bUxWmDgSXP4
I'm far from an expert in the genre, but I do like Bim Skala Bim's cover of Pink Floyd's "Brain Damage."
http://www.youtube.com/watch?v=rO33mNR4ogU