Cahoot WEBCARD anyone??
I still don't understand why the Cahoot Webcard system (which hasn't been invented by Cahoot, some Irish and US or Canadian Banks use it too) hasn't been adopted by everyone.
It's one time credit card numbers with individual limits the user can set him/herself (within their general credit limit) and valid for only a single transaction generated on the fly when needed, fairly bulletproof, certainly much better than using you physical credit card details on the web.
Unless Visa and the banks don't actually want a very secure system....