OK, first pass of http://code.google.com/p/barnaby is available for download of the source. This is a C++ library with two functions:

1) List all of the timezones

2) For a given timezone name, convert UTC to that timezone

It will build a DLL for you if you open the project using Visual C++. The timezone data is only version 2011i, so I will need to update it soon.

Please let me know any and all feedback.

Blessings!