There has been a lot of pro-Mono and anti-Mono arguments assaulting the community of late. The debate is not new but both sides have taken up arms since some distributions have decided to either remove Mono or include Mono by default.

Mono is an open source project led by Novell to create a .NET-compatible set of tools that include, among others, a C# compiler and a Common Language Runtime. Mono can be run on Linux, BSD, UNIX, Mac OS X, Solaris, and Windows operating systems.

Now that Microsoft formally recognises the contribution of Miguel de Icaza to Microsoft, there is no longer any reason to think of Mono as beneficial to GNU/Linux

Another GNU/Linux distribution throws Mono out; Microsoft's foundation may adopt more from Novell

When you think mono, you think tired. You think sleepy. You think shut-yourself-up-in-your-bedroom-for-two-weeks-and-snooze-like-Rip-Van-Winkle. You get the idea. But that is not how it should be. Mono isn’t boring. Mono should excite people!

Mono-Nono's opinion on bad treatment of Mono dissenters and Mono resistance from Groklaw

As criticism of Novell's Mono keeps rising, Mono entanglements seemingly continue to spread further (even in a KDE distribution)

Some more thoughts about Mono and also new developments (against Mono)

The Google App Engine doesn’t really advance the cause of evil all that much, but it’s not exactly good, either. Google makes a big deal about its corporate motto, “Don’t be evil”, but at the end of the day, Google really is just another corporation, no matter how well-intentioned its founders may have been.