Been digging around for a new Blackberry Torch deal for the Mrs, so obviously is has to be white, not the normal black jobbie!
Anyway, found this little belter at Dialaphone:-
500 Minutes Anytime
500MB Blackberry Internet & Email
Unlimited Wifi Access
24 Month Contract
4 Months Free (£102.12 by redemption)
Monthly Average - £21.28
Total Cost - £510.72
You can also do quidco, but i'll leave it to you lot to figure out. Checked out moneysupermarket and a few other sites, and they seem to think its the cheapest deal to.