I'm thinking about buying that wig too just to see which one will have the best potential. Then again, I was thinking about just cutting and dying my own hair but SOOOO not looking forward to all the teasing that would have to be done.
I also noticed two different set of 'official' hat pins floating about for pre-order. The first one you posted and then there is this one here...
Mad Hatter Hat Pins - Mad Hatter Halloween Costume Accessories
I'm thinking the latter of the two might be the actual pins as the first set looks like a 'prototype' of sorts and the second looks like the actual product in the box.
I also wanted to throw this out there as a word of caution. By recommendation from a local costume shop, I ordered a hat that I planned to mod through spirithalloween.com, however, their advertised hat is not what I received... I ordered what was on the left and got the mess on the right which I can't do anything with. I can't even salvage the frame because it's WAY too small, even for my pimple of a head...
After I called and complained, they marked the item as 'unavailable' on their website.
Mad Hatter Top Hat in Accessories & Hats Basic Accessories New for 2010 Accessories They offered to refund my money if I paid to ship it back and paid a restocking fee, but it's not worth all the hassle when I could just sell it online for the full price I paid for it. Ah well. Looks like I'll have to try and make my own from the bottom up since I don't have anymore 'mad money' to spend on another hat after buying my textbooks for college