Just out of interest, will they be printed like last years, or 07's?
LT is correct - they will be screen-printed as in '07 and before.
It was a trial shot last year with the heat-transfer method, and whilst they were cheaper and more options were available, as you (and everyone else) has found, the printing was not very durable (basically, they were cr*p  

).  So I have gone back to the screen-print.
Incidentally, I have learnt something about this process.  I always thought that the 'screen' bit referred to a computer screen, but it doesnt.  A mesh screen is made for each of the colours in the design, which 'screens' the rest of the shirt from that particular colour.  So if there are 4 colours, that means 4 screens have to be made, and 4 separate print passes occur to get the final pic.  That's why it's more expensive and involves a set-up cost for each colour.  Now you know  
 
 
Del