
Mono Tools are available at different price points. An individual license costs $99. It is good for a single person. The enterprise license costs $245. It allows one person in your organization to use the product. However the license can be transferred between developers in your organization. Finally there is a five seat developer license goes for $2499.
There are plans to enhance Mono Tools to target other Linux distributions. Here is a tip if you decide to buy a copy of Mono Tools: You need to close Visual Studio before you start the Mono Tools install. Enjoy all you Linux .NET folks.