I don't listen to a lot of the more ska-punk/core flavored banRAB but here are some of my favorites:
The Toasters, (incredible live )
Five Iron Frenzy, (they broke up )
spring heeled jack, (broke up... awesome though!)
catch 22, (only keasby & alone.. they kinda suck now)
mass hysteria, (great local rock-steady band with awesome female vox)
mustard plug, (I like their older stuff)
the aquabats, (fun fun band!)
skankin' pickle (they broke up,.. Hussein skank, lol)
the planet smashers, (like thier older stuff, hate thier new album)
the smooths, (I'm pretty sure they broke up, good smooth sound though)
Mephiskapheles (nothing beats satanic ska!)
bim skala bim, (another great local, going on for 20+ years)
eastern standard time, (good stuff!)
and lets not forget 'the specials'...
anyhow just to name a few...