I actually sent an email to Maxis (actually it was from their website enquiry) on this and got a call from them the next day. They gave me some info on the revision of iPhone rates and that's all I'm telling, my lips are sealed. If you guys wanna know, you all should send an enquiry to Maxis from their website and they'll give you a call. If all you of you do this then they'll probably push the revision date earlier due to HIGH DEMAND. The more the merrier, how bout that? And the best thing is, we don't have to change telcos, the TELCO just need to change their rates to a more competitive one.

Actually I just send a general enquiry that DiGi has come up with a very competitive plan and what is Maxis doing about it and that I was seriously considering switching to it and that many others might follow suit.
The reply was that they (Maxis) has come up with new rate plans as it has been a year since any iPhone rate plans change but they cannot reveal the date yet but it should be very soon.
My prediction is that it will be sometime in May. I also predict that their rate plan will probably RM85, RM135 and RM235 (to be very competitive). I guess DiGi had the upperhand when they came up with their rate plans as they don't have as much infra invested as Maxis and Celcom have (my opinion) but maybe someone else have some info on this.
On another note, I hope Maxis can come up with some rate plans to counter DiGi's Blackberry RM58 Smart Plan (Whew!, that is really some smart plan).

Here's the link. You all have a go .

Maxis Enquiry