Yes, it's a limited time offer, just arrived in my email.
No interest to me, but I thought I'd pass it on...

CLAIM UP TO £60 CASHBACK THIS WEEKEND ONLY
The PowerShot range has it all. In fact there’s only one thing that would make them even more tempting – a Cashback offer. And if you purchase from Thursday 24 to Tuesday 29 May, that is exactly what Canon is giving you:
• PowerShot A550 £30 Cashback
• PowerShot A560 £40 Cashback
• PowerShot A570 IS £50 Cashback (only available from Independent retailers)
• PowerShot A630 £50 Cashback
• PowerShot A710 IS £50 Cashback (only available from Jessops)
• PowerShot A640 £60 Cashback

Visit the Canon website (http://trc1.emv2.com/I?a=A9X7CqhKh8BV8TIJ_KKMwm_jvg) to download your claim form and then all you need to do is decide which PowerShot is right for you!

Canon USA has Cash Back on some lenses, check out: http://www.robertsimaging.com/index.jsp

This is at Roberts Distributors in Indianapolis and they are a great place to deal with, not always the lowest prices but great service.

JS