When I first saw PowerGUI I was suspicious. Quest is a first rate company that is very proud of their tools. I've personally drove the purchase of their tools for Oracle Development a few years back.
Quest made a Press Release for PowerGUI. It doesn't really commit to keeping it free. Besides, it's still Beta. I figured the other foot would drop when it got released. And by foot, I mean several hundred dollars of foot.
Dimitry Sotnikov recent post announces a new download - that's still Free! Still slightly leery, I did some searching and found his commentary Why is Quest doing free PowerShell stuff?
While I can't imagine Quest committing to keeping it free, it looks like it is for now!
Don't get me wrong, I'm not a "profit is evil" kind of guy. But I find it difficult to keep up with the license management for my team. A product has to be core to the job and save a magnitude more time that it costs fooling with it. Who knows, we might get addicted to it and maybe Quest will charge a hundred dollars or less for it.
Hopeful Microsoft will make the definitive editor for PowerShell. Hey, maybe integrate into Visual Studio! We pay thousands of dollars per developer per year and you would think an intellisense editor for PowerShell wouldn't be too much to ask for. (I'm hoping Bruce will slap me down again and show me where I've missed it.)