Whose about to step in and take away some of Redgate's future clients? Jetbrains! Yes, the same ones that develop another much loved tool: ReSharper. They're introducing decompiling capabilities in their tool and also promising to release the decompiler as a free standalone tool by the end of the year! Check it out here: http://blogs.jetbrains.com/dotnet/
That got me thinking if it's finally time to buy ReSharper! What about you?
Also, there's another free tool on the horizon: ILSpy
Edit (24/02/2011): It seems another alternative is about to rise on the horizon! If you look at the Telerik's JustCode pre-release blog post (where they provide a special preview of the release highlights for their Q1'2011 release) you can read the following paragraph:
The new decompiling functionality will enable you to recover lost source code and allow you to explore and analyze compiled .NET assemblies. We know a lot of you will welcome this addition as it comes in response to your feedback and recent developments in the industry.