Here's an update to the Tiled Converter: http://www.mediafire.com/?wulvvjc8ju0m5wl
This update fixes several issues and adds a couple of features, such as loading the tilesets from multiple possible directories in the loader. You can also specify an output directory by passing -dir to the converter's arguments.
I'm also considering rewriting the converter's code so that it works with generic C++ and so I can also release it as full source code under the public domain. If anybody's interested, please let me know!