Below are a list of guides for the first bosses of Ulduar. It seems there are few guides written specifically for the normal versions so I assume that 10 man and 25 man encounters are pretty similar from a strategic point of view:
Flame Leviatan guide at ZugGaming
Flame Leviathan guide att World of Matticus
Matticus guides are from a healer perspective but also gives detailed descriptions of the encounters as a whole.
Flame Leviathan at Bosskilers.com
On this site there are also links to movies showing the Flame Leviathan fight.
Ignis the Furnace Master guide at ZugGaming
Ignis the Furnace Master guide at Bosskillers.com
Ignis the Furnace Master guide at World of Matticus
This guide shows in detail a way to position the raid for the fight. Maybe not what we will try first but worth to have in mind.