I recently purchased 2 of these cards from PC World, so know this deal does work.
PC World currently have their 110% price promise, and have a limited number of people they will price match against.
The price for their 2gb Sandisk Micro SD card on their site is £19.85 (bloomin ridiculous price), however they say they will pricematch http://www.play.com,
and play have the same card for a mere £8.49 (UPDATE, PLAY HAVE REDUCED THEIR PRICE TO £7.99, MAKING THE PC WORLD PRICEMATCH PRICE NOW £6.81)
PC World will match this price, and take 10% of the difference off, reducing the price of a 2gb Micro SD card on the high street to a SUPERB £7.36
I managed to bag 2 of these, even though the t&c's of the price match mention that it is limited to 1.
Best to check the majority of memory cards at Pc World, as there are bargains to be had, eg.
Sandisk Extreme 3 2gb Compact Flash - PC world £59..99, Play.com £13.49
Price after pricematch - £8.84
Sandisk Extreme 3 4gb Compact Flash - PC World £94.99, Play.com £22.99
Price after pricematch - £15.79