The Chronic Dev team did say the Windows version of the "Absinthe" Greenpois0n jailbreak tool was coming soon, and apparently now is "soon." That's right folks! Those of you with only Windows-based PCs can now jailbreak your A5-powered iDevices, iPhone 4S and iPad 2, running iOS 5.
It appears the Greenpois0n website is still experiencing high volumes of traffic, therefore, you likely won't be able to get the link too easily. However, here is a direct link to the Windows version of the Absinthe tool.
After you begin the download, take a look at our jailbreak video walkthrough and Absinthe pre-application tips before running the actual jailbreak app.
For easy reference purposes, here is a direct link to the Mac OS X version of the Absinthe tool.