The Insyderz - Experimental ska-core
Five Iron Frenzy - All types of ska
The Supertones - rockish ska, sometimes slow, sometimes rappish
B.O.B - ska rock
Ten to One-skunk(ska+punk)
They are now SIDESTEP - punk
Buck - ska rock
BBBFB3 - ska rock
Dayz Wage - ska rock
Big Dog Small Fence - 2nd wave ska
The Skamatics - goofy non-heavy ska(nice horns)
Ska '98(Made up by a bunch of people, AudioX arrangement)
GodRocket - skunk(ska+punk)
Honey Locust - skunk with some rappish influences(black singer :D)
SKACRAZE 1 and 2 had awesome bands on it...Gimerstick, buckledown, the one and only Skallelujah, Nifty Fifty, Nifty Tom 50...and much more.

PUNK, HARDCORE & THRASH BANDS(oh my!)

MXPX - Street punk to Skate Punk to pop-punk to punk
Dogwood - Punk with an edge(i don't have matt aragon)
Old Slick Shoes - Punk
Old 7-10 Split - Punk/New Metal
Pocket Change - Punk
The Temper Tantrums - 3 girl punk band
Ninety Pound Wuss - Scream Punk to Experimental Scream Hardcore
War Rocket Ajax - Punk with a Western Edge
The Fraidy Cats - Punk with hardcore influence
Left Out - Punk
The Undecided - Pop-Punk
Face Value - Skunk to Punk
Tourniquet - Metal of many types
Twotimer - Punk
Relient K - Pop-punk
Noggin Toboggan - Pop-punk
Broken Cedars - Punk with high vocals - GET THEIR 2nd CD FREE!
Officer Negative - Street Punk to Hardcore Heavy Punk to Screamo - GET THEIR FIRST CDs CHEAP!
The Combat Junkies - Street Punk(Called "The Executed" now?) Johnny Respect - Punk
Black Cherry Soda - Punk
Born Blind - Hardcore with the speed of punk
Every Man's Hero - Heavy Punk(vocals screamed)
Spudgun - Street Punk(different name now?)
The Smiley Kids - Happy punk(they have some hardcore punk songs though)
One 21 - Punk to Rockish Punk
Crux - Street Punk
The Crucified - Punk to Thrash/Metal
Outer Circle - Punk
The Blamed - Punk to ?

Believer - Thrash Metal
Betrayal - Gothic Thrash Metal
Sick Of Change - Punk
Aspiring Joe Average - Real Talented Punk
Freeto Boat - Skacore to Punk
Six feet deep - Early Hardcore
Deliverance - Thrashmetal to Metal to Prog. Metal w/ electronica thrown in
The Lead
Hanover Saints(street punk)
Bloody Sunday(hardcore)
Jesus Wept(hardcore)
Living Sacrifice(thrash-metal to metalcore)
Subseven(punk/emo/core)
Falling Up
E.SO - rap/rock