What is an imagefest, exactly? Well, it has a lot of images for one thing. It's basically a collection of images of a game/process/etc. with funny commentary. These are a big hit lately, so definitely check some out. If you are on a dial-up connection, you might want to go read a book or something while the images load.

Ben
POS: the Game (October - November '05)
The Internet (December '05 - January '06)
A Ladybug (January '07)
Wally Bear and the NO! Gang (January '07)
Donkey Kong (January '07)
School (February '07)
Holy Shit Brooke (April '07)
Pictochat (May '08)
Soap's Package (May '08)
Registering on TheDailyPOS.org (May '08)
Krem's Package (June '08)
Ben's Dorm (September '09)

Cannonfodder
Parasite Eve (August '08 - ongoing)

David
Krem's Package (July '08)

Dawn
Star Tropics (July '09 - ongoing)

Draino
Pokemon Quartz (July '07 - October '07)
Fire Emblem: The Sacred Stones (November '07 - Ongoing[??])
Pokemon Trading Card Game (May '08 - Ongoing)

GSGold
Kirby's Dreamland 3 (January '07)
Advance Wars 2: Black Hole Rising (October '07 - May '08)
Kingdom Hearts: Chain of Memories (June '08 - Ongoing)

KennyMan666
Gun.Smoke (January '07)
Saturday Laundry (January '07)
Sunday Laundry (April '08)
Portrait of Pirates - Franky (July '08)
Quackshot (March '09 - Ongoing)
Building a Computer (July '09)
The Burger (March '10)

MetaDeDeDe
Mother 3 (June '09 - Ongoing)

Name
Puyo Pop Fever (January '07)

Rick
Life (December '06 - January '07)
Toejam & Earl (January '07)
Worms (November '07)

SCrow Funk
Mega Man 64 (August '08)

SK
McDonald's Treasure Land Adventure (February '07)
Cave Story (April '07 - Ongoing)
Beavis and Butthead (April '07)
Metal Slug 2 (with guest commentator Yoshi348) (February '08)
I am laughing Texas Packagefest 2009 (August '08)
World of Illusion (June '09)
Namco X Capcom (July '09)

Soaprman
Doom (December '06 - January '07)
Doom II: Hell on Earth (January '07 - March '07)
Pac-Man 2 (February '07)
Rick's PACKAGE (March '07)
Pokémon Cards (April '07)
Advance Wars 2 custom map "The Anguish of Sorrows" (October '07)
The McDonald's Quality Story (July '08)
Wario Land 3 (June '09)

Yoshi348
Faceball 2000 (July '07)
The Legend of Zelda: Link's Awakening (November '07 - December '07)
Metal Slug (with guest commentator SK) (February '08)
Metal Slug 3 (February '08)
Mario's Time Machine (NES) (March '08)
Golden Sun (May '09 - Ongoing)

Multi-Man Imagefests
Super Metroid by Soap on a Rope, GSGold, SK, Krem, Yoshi348, and YourAverageJoe (April '07 - June '07)
Pokemon Yellow by GSGold, Static2007, Kroscko, Soap on a Rope, SK, Yoshi348, Spatulater, Ben, and Rick (June '07 - August '07)
Donkey Kong 64 by Soap on a Rope, SK, Krem, and Grimes (March '08 - April '08)
Metroid Zero Mission by SK and Soap on a Rope (April '08)
A Stroll Down Memory Lane by Krem, Wally, and SK (June '08)
Sonic Battle by Soap on a Rope and SK (ft. Krem and GSGold) (August '08)
Castlevania: Aria of Sorrow by Soap on a Rope and SK (August - November '08)
The Legend of Zelda: Ocarina of Time by SK, Soap on a Rope, Cannonfodder, SCrow Funk, JaggerG, NLA, David, and Krem (January '09 - ongoing)
Kirby 64: The Crystal Shards by SK and Yoshi348 (June '09 - July '09)
Super Mario RPG by POS Staff (August '09 - Ongoing)
Super Mario Land by POS Staff (August '09 - Ongoing)