As per the title, $10 for every shirt on the site. Not as good as the $9 shirt sale they had on the 16th, but at least you get longer to decide what you like!
From experience the mens US shirts are a little bit bigger than Aus sizes here (marginal). Also, i bought some over 6 months ago, and the print hasn't cracked. Plenty of discussion on previous threads located here - http://www.ozbargain.com.au/deals/threadless.com
Offer expires on the 4th, US (Californian? time).
NB: There is NO "affiliate link" in the web address.
Happy New Year All.
Davo
Cool, looks like all T-Shirts are $10 not just the mens! Two thumbs up. :)