I agree about the Ska, cant beat it
Little known bands you may like to check out could include:
The Mighty Mighty Bosstones (ska)
Sublime (Ska/Reggae)
Dispatch (Ska/Reggae)
Mustardplug (Ska)
Trickside (Ska)
Panic!atthedisco (Rock/Pop)
RX Bandits (Ska punk)
My Awesome Compilation (Rock/PopPunk)
Alexisonfire (emo/posthardcore)
Hawthorne Heights (Emo)
Plus-44 (Pop Punk / Emo) (This is Mark Hoppus and Travis Barker of Blink182's new band)
Angels and Airwaves (Emo) (Tom Delonge from Blink's new band)
Rufio (Emo/PopPunk)
The Starting Line (Pop Punk)
Hawk Nelson (Pop Punk)
Reliant K (Pop Punk)
Autopilot off (Pop Punk)
The Caesars (Rock)
Goldfinger (Ska Punk)
No Comply (SkaCore)
Capdown (Ska)
I could go on all day but i imagine that ive posted enough bands for people to have a little listen to if they like the genre and on the other hand i fully expect a load of posts taking the p*ss outta my taste lol. Thats forums for ya
I know some of those bands have kinda broken through into mainstream now, but you still might not have heard much of them.
May I also recommend a site you can listen to most these bands on and find others;
www.purevolume.com its great for finding new, unsigned and upcoming bands, as well as well known ones.
Hope some1 finds the list useful