Fee Fi Fo Fum, a Fire Giant I've become!!!

[Lonely Tylenol]

Your weapon doesn't resize when you polymorph so if you don't have a spare large weapon to hand you would be at penalties to hit and the weapon damage doesn't go up.

Yes it does. Check the Rules of the Game article.

For purposes of most polymorph effects, one can divide creatures into types that have basically humanoid shapes and those that do not, as follows:
Humanoid Shapes: Fey, Giant, Humanoid, Monstrous Humanoid, Outsider*
Nonhumanoid Shapes: Aberration, Animal, Dragon, Elemental, Ooze, Vermin
*Most, but not all outsiders have humanoid shapes.

In general, a change from one form that has a humanoid shape to another form that has a humanoid shape leaves all equipment in place and functioning. The subject's equipment changes to match the assumed form. It becomes the appropriate size for the assumed form and it fits the assumed form. The spellcaster can change minor details in your equipment, such as color, surface texture, and decoration.

The description then goes on to stat up a sorcerer who, when turned into a Troll, wields a quarterstaff which does 1d8+9 damage, suggesting that his staff got increased one size category when he did.

It's not technically the core RAW, but it's official, and the listing in the RAW is pretty vague about the subject:

When the change occurs, your equipment, if any, either remains worn or held by the new form (if it is capable of wearing or holding the item), or melds into the new form and becomes nonfunctional. When you revert to your true form, any objects previously melded into the new form reappear in the same location on your body they previously occupied and are once again functional. Any new items you wore in the assumed form and can’t wear in your normal form fall off and land at your feet; any that you could wear in either form or carry in a body part common to both forms at the time of reversion are still held in the same way. Any part of the body or piece of equipment that is separated from the whole reverts to its true form.

 

[noeuphoria]

That doesn't seem ridiculously overpowered for a 4th level spell. After all, enlarge person increases your gear, so we're essentially saying that polymorph can enlarge you and give better str, con, and nat armor bonuses than enlarge person, which is fine seeing as how it's higher level. I can see it being broken when, with the availibility of all books, someone goes through and finds the absolute uberest form to change into, like the war troll. If that's the case, I'd probably just houserule that you can't polymorph into something you haven't seen, although I'd probably still let shapechange allow any possible form.

 

[Darmanicus]

Oh yeah, there is a thread here with an actual topic.

I am fond of the Treant for the AC because at that level of play even the mooks have a lot of offense and unlucky criticals can really spoil your day. With that much spell power in the party just being a meatshield that keeps breathing is a viable, albeit less than glamorous, tactic.

I also play with DMs who are towards the stingy side when it comes to polymorphing and equipment. How does your DM handle it? Do you get to play a Treant in plate armor?

Ok a month late, almost forgot about this thread.

Our DM's fine with the gear resizing/shaping and as someone else pointed out, the 'enlarge' spell does the resizing and that's just a 1st level spell so there shouldn't be a problem with a 4th level spell allowing the reshaping aspect also. We need every advantage we can get now coz two of the players have left, (samurai/kensai and ranger/archer).