The link to draconic wildshape forms appears to lead nowhere useful. I searched around but couldnt find it, anyone still have a copy of it lying around?
Edit: Found some good info on the wiki
http://coboard.wikia.com/wiki/Druid. I'll repost it here for convenience
The Dragon Wild Shape feat from Draconomicon gives all the Su and Ex abilities of a dragon. While dragons aren't quite as much melee combatants as your better animal forms, the ability to speak, good natural armor, breathweapons, immunities, SR, and miscellaneous other supernatural abilities make this a very powerful choice, especially for druids who prefer to cast spells.
Several dragons have Alternate Form several times per day, usually for medium or smaller humanoids and animals. This can be used to effectively multiply your wild shape choices, though it prevents large forms and plants.
* Level 12
o Young Steel Dragon (DoF) Move 60 ft. fly 200 (poor) 30 ft swim, 19 AC, SR 20 (30 vs spells of 4th level or lower), Alternate form 5 times per day, acid immunity, poison resistance and a 3 con damage breath weapon (reflex half). The SR and con breath weapon make this a worthwhile form.
o Juvenile Mercury Dragon (DoF) Move 60 ft. fly 250 (good), 24 AC, , Alternate form 3 times per day, fire immunity, and a 4d8 breath weapon (reflex half). Good AC and a great flyer.
o Juvenile Mist Dragon (DoF) Move 40 ft. fly 150 (poor), 21 AC, Mist Form, fire and acid immunity, and a 5d6 breath weapon (reflex half). The Mist form ability is a great defensive ability, especially in conjunction with a way of conjuring mist or fog.
o Young Shadow Dragon (Drac) Move 80 ft. fly 150 (average), 24 AC, SR 15, 1 negative level (reflex half) breath weapon and total concealment out of sunlight. The last one is probably the best ability of bunch (Total concealment is a superb defensive ability), but nothing to complain about for any of them.
* Level 13
o Juvenile Steel Dragon (DoF) An extra 2 AC and 2 SR over the young steel dragon, as well as breath weapon and stat boosts. Remains a solid choice
o Juvenile Shadow Dragon (Drac) A boost to AC, SR, Stats, size, and best of all breath weapon at the cost of maneuverability. A good upgrade.
* Level 15
o Young Adult Mercury Dragon (DoF) The typical breathweapon/AC boosts, but gains DR, SR, and frightful presence.
* Level 16
o Young Adult Steel Dragon (DoF) The typical boosts as well as DR and Frightful presence from Young Adult.
o Young Adult Shadow Dragon (Drac) The normal boosts to Young Adult (DR, Frightful presence) and the normal SR/Stat/AC boosts.