I'm usually really suspicious of VistaPrint, their postage charges etc but have just order and thought this was a good deal -
A custom made, with your own wording (you can add pics at extra cost) T-shirt - incl delivery (i also added a few 'free things' magnets etc) all for £4.
I'd been looking at the slogan tshirts online and they're about £15 so i stole the wording & made my own!
You have to go via quidco to get it thou.
Coupon code VP30FO2010 gets you 30% off, then quidco is paying 50% cash back on the balance (thought it's not clear on quidco) so a total of about 65% discount and a final price of £4 for a tshirt, and some freebies, incl postage
My quidco validated overnight.
I know people will vote this cold cause it's vistaprint and your unlikely to have the goods for xmas unless you pay for more quicker postage, there's also no promises quidco will track, but £4 for a personally designed t-shirt I thought was good value.