Compiled libraries can be downloaded here: http://code.google.com/p/csipopt/downloads/list
The source code is available here: https://github.com/cureos/csipopt/tags
A detailed description of the improvements and usage is provided here: https://github.com/cureos/csipopt/wiki/Substantially-extended-API
Highlights include:
- Unsafe directive requirement removed
- IpoptProblem sub-classable, yielding cleaner instantiation of the optimization problems
- Native Ipopt methods publicly available
- Silverlight 5 supported in elevated-trust, out-of-browser applications
Do not hesitate to discuss or report experiences and problems in the csipopt forum!