Tested the program

Here're some comments:
1) The interface is a bit hard to use (for instance, most options in Vectors menu - who knows what they do).
2) When using batch mode, was unable to get a decent raster->vector conversion.
3) Can't really judge performance with other programs (since don't use them), but vectorizing 2000x1500 photo it took quite some time (about 2 mins) on P4 2.4 Ghz. Macromedia Flash took about 3 seconds to vectorize the same photo (it looks different though and I don't know if performance is affected by vectorization options).

In overall, the application seems very promising, so keep up good work
Btw, what compiler did you use to create this?