Ska just progressed.
The Specials, The Smiths, Madness in 70's and 80's.
Then people started to mix it with punk and rock.
There are masses of Ska bands around, many in the UK. Lightyear, The JB Conspiracy, Munky Punch, Jesse James
Looky here http://www.moonskaworld.com/
Then theres the yanks. Mad Caddies, Less Than Jake, Rancid, Reel Big Fish, Streetlight Manifesto