I wanna start a post for heroic guides to Firelands as we are going to try some, and to help people find them, and I'll update the post as i find more or you give me links for other guides.
Universal guides:
http://www.mmomeltingpot.com/2011/09/quick-read-firelands-tactics-our-survival-guide-for-the-firelands-raid/
http://www.icy-veins.com/firelands-raid
Shannox Heroic:
LearntoRaid movie guide: http://www.youtube.com/watch?v=-uT1xrga58s&feature=BFa&list=PL34BB0B5D9CA0951C&lf=results_main
Beth'tilac Heroic:
LearntoRaid movie guide: http://www.youtube.com/watch?v=MnjiT-6-YO8&feature=BFa&list=PL34BB0B5D9CA0951C&lf=results_main
Lord Rhyolith Heroic:
LearntoRaid movie guide: http://www.youtube.com/watch?v=GyLUP8HohZM
Alysrazor Heroic:
LearntoRaid movie guide: http://www.youtube.com/watch?v=PfXvWBjMcj8&feature=BFa&list=PL34BB0B5D9CA0951C&lf=results_main
Baleroc Heroic:
LearntoRaid movie guide: http://www.youtube.com/watch?v=v5arOU2p8Bw&feature=BFa&list=PL34BB0B5D9CA0951C&lf=results_main
Majordromo Staghelm Heroic:
LearntoRaid movie guide: http://www.youtube.com/watch?v=d61jIDKPc-E&feature=BFa&list=PL34BB0B5D9CA0951C&lf=results_main
Ragnaros Heroic:
LearntoRaid movie guide: http://www.youtube.com/watch?v=kFPdFSDDCWc&feature=BFa&list=PL34BB0B5D9CA0951C&lf=results_main