One of my first posts so please be gentle :)
Found this today and thought it was a cracking deal.
O2 are doing Half price dongles for £14.67 but quidco through O2 are saying if you top up £15 you get £25 cashback, so the stick plus 3Gb (30 days) comes to £4.67.
O2 USB Modem E160 Whitehttp://shop.o2.co.uk/promo/o2mobilebroadband/tab/Pay_and_Go
Sorry forgot to attach link