Upgraded to Plupload 2.1.1. Rewrote most of the component code to more closely mimic the standard Upload component. This removes some Plupload features but it makes it much easier to use as a drop in replacement for Upload.
Switched to using ClassResources for the Flash and SWF components.
Switched to using the standard FileUploadHandler rather than a custom handler. This reduces the implementation to a single file. Still needs lots of documentation and code cleanup but the basic functionality looks good.