As to the impending trading update, I note that in 2005 it was released on January 21st; In 2004, January 16th; and during 2003, January 20th. Of course, nothing appeared in 2006 due to the fire.
So, presumably, for 2007 anywhere between January 16th and 22nd. My guess would be the week 15th-19th.
PS: A 'Daily Express' mention of ASOS occurs in the David Shand 'Market Report' section. It reads, "... While suggestions that it was trading well ahead of budget led to a 7p mark-up to 118.75p at online retailer ASOS."