Don't trust these fake rumors. They might lead you to a harmful site.
CS4 just came out about came last november or december to the public. It is very unlikely that CS5 will launch anytime soon. You need to wait about a year, maybe two.
CS5 will most likely play up to the 64-bit abilities of Windows 7 and OS X 10.6, so I imagine Adobe is working hard with the developer tool kits from both companies.
