Yes! Starting at 8 a.m. EST on November 26 (the day this Arcana appears), there are five guild hats for sale on mtgmerch.com!
For the first day, they're $15. So if you're reading this on November 26, 2012, the hats are $15. But at midnight EST, they go up to $20.
And as long as we're talking about sales, all the Magic T-shirts are on sale for $18 on November 26, 2012. But just like the hats, prices go up to $20 at midnight.
And there's free shipping with the purchase of $50 or more!
To sum up: mtgmerch.com. New hats! Both hats and shirts are on sale on November 26, 2012, but they both go up to $20 at midnight Eastern time.