Immediate Future, new products (not including "Offered Again's"):
Game Trade Monthly #83 (Products releasing Feb/Mar 07):
Total of 13 products from 5 companies.
Official D&D
Dragon #355 (Paizo, pg. 24)
Dungeon #146 (Paizo, pg. 24)
Deluxe Dice (Wizards of the Coast, pg. 36)
FR: Cormyr HC (Wizards of the Coast, pg. 36)
Magic Item Compendium (Wizards of the Coast, pg. 36)
Traditional d20:
DCC #43: The Curse of the Barrens (Goodman Games, pg. 20)
DCC CD #0-#4 (Goodman Games, pg. 20)
Etherscope Rulebook SC (Goodman Games, pg. 20)
XCrawl: Coney Island Crawl (Goodman Games, pg. 20)
Bleeding Edge #5: Temple of the Death Goddess (Green Ronin, pg. 20)
M&M Official or Superlink:
Autumn Arbor Campaign Setting (Arbor Productions, pg. 17)
Instant Superheroes (Green Ronin, pg. 20)
Star Wars
Star Wars RPG: Saga Edition HC (Wizards of the Coast, pg. 37)
Game Trade Monthly #84 (Products releasing Mar/Apr 07):
Total of 14 products from 5 companies.
Official D&D
Dragon Magazine: Monster Ecologies (Paizo, pg. 30)
Dragon #356 (Paizo, pg. 30)
Dungeon #147 (Paizo, pg. 31)
Expedition to the Demonweb Pits HC (Wizards of the Coast pg. 42)
Fantastic Locations: City of Peril (Wizards of the Coast pg. 42)
Eberron: Curse of the Dragon's Eye (Wizards of the Coast pg. 43)
Traditional d20
DCC #44: Dreaming Caverns of the Duergar (Goodman Games, pg. 24)
DCC #45: The Medusa's Grotto (Goodman Games, pg. 24)
DCC: Heroes of the Northlands (Goodman Games, pg. 24)
XCrawl: Dungeonbattle Brooklyn (Goodman Games, pg. 24)
GameMastery Map Packs (Paizo, pg. 31)
Castles & Crusades
Secret of Smuggler's Cove (Goodman Games, pg. 24)
DB3: Deeper Darkness (Troll Lord Games, pg. 38)
M&M Official or Superlink
Hero High (Green Ronin, pg. 26)
Note that Mongoose has no d20 product releases planned for a whole 3-month period, though they had several RuneQuest products and plenty of minis planned. Nothing from Kenzer & Company, D&D-wise, nor from MWP (though I'm not sure about the Dragonvarld RPG book listed... it does not mention a system of any kind, so I suspect they are using their house system, the one used for Serenity, Battlestar Galactica, and in the past, Sovereign Stone).
Any way you cut it, this is a severe drop in the regular d20 products being offered through the distribution/retail system.