http://74.125.95.132/search?q=cache:http://greedygoblin.blogspot.com/2009/08/ungeared.html
In case you are lazy and do not want to click on the link here is a TL:DR summary
10 players downed Ulduar in all blue gear without use of epic gems (1 epic gem due to jewel crafting profession) enchants that take abyss crystals and enchants that are given by professions. They downed ALL OF ULDUAR IN BLUES.
Bring the SKILL not the PLAYER.
Regards,
Exael