Hi,
You're correct, Wine only works on x86 based systems (like normal desktop computers) and thus won't work on the PS3.
You're more than welcome to try and compile the unofficial client. However, you'll need to be able to get Qt4 installed, and I'm unsure if it's supported on the PS3 either.
Officially though, we don't plan to support Palringo on the PS3. The new systems don't have the option to install Linux and from the installed base of the older PS3 there are a (very) limited number of users that would find this useful.
Andy