It should be within 3-5 working days. But it depends whether how fast the merchant post the transactions back to the bank, some as fast within 24 hours (especially for petrol stations and certain department stores), some can take up to 1 week or more. I've had transactions which are only posted after 3 months in extreme cases, could be they forgot or lost my transactions and post it when they found it later. I recommend you have a system where you track your actual purchases vs. the posted transactions in your statement. Don't be too quick to throw your slips away for those that did not appear in your statement. These won't happen often but sometimes you might encounter it.
The last thing you want to do is to dispute a real transactions which you performed (and forgot all about it). For such disputes, the bank may charge you administrative fees and possibly other fees that will make you upset.
P/S Got my PS3 during the launch. Paid it using my cc. Yes, Sony Centre accept cc.
Added on December 30, 2008, 12:21 pmFor me, I'd perfer to apply it through the booth (agents) setup @ the fairs / shopping malls / etc. At least I can "chat" up the friendly agents.

Beware of rogue agents and I'll only apply when I feel comfortable applying with that person. I'm particular about the way my documents are being handled and if I see anything wrong, I may just walk out, take all my documents away and cancel the application. Sounds harsh but I have to protect myself (at least attempt) from identity theft/fraud.
I don't think it is any different with applying online coz the approval process is still the same as it will be subjected to the same treatment the credit control department of the bank. (Generally the approving authority for cc) Is is merely a self service system where agents are not required and sometimes you are "rewarded" with some freebies (or extra annual fee waivers) when you use the system. Don't forget that you still need to submit the documentations to the bank.
I don't mind applying via the agents coz at least they do most of the work.
But recently I notice that banks do not rent booth in shoppings malls anymore, except for Citibank in Giant which only promotes Giant Citibank card or AEON in JJ stores. Last time there used to be a lot... chasing ppl around the mall. Since this yr I hardly see any.