Wondering what is the exact release date of Adobe CS4 software like Photoshop CS4, Flash Professional CS4, etc ?

According to Terri of Creative Pro, Adobe typically takes 18-24 months to ship a new version of their product.

Since Adobe CS3 Creative Suite was released in April 2007, Adobe Creative Suite CS4 release should happen somewhere between December 2008 and April 2009.

Adobe Creative Suite 4 is expected to include the following software – Dreamweaver CS4, Fireworks CS4, Contribute CS4, Encore CS4, After Effects CS4 Professional, Adobe Premiere Pro CS4, Soundbooth CS4, InDesign CS4, Photoshop CS4, Illustrator CS4, Acrobat CS4 Professional, Flash CS4 Professional, Adobe Bridge CS4, Version Cue CS4, Adobe Device Central CS4, Adobe OnLocation CS4 and Ultra CS4.