Following on from this thread, I thought I'd write a simple (and free!) utility for Windows to convert a raster image (JPEG, PNG, etc) into an SVG Tiny file, so it can be used as an Application Icon on Symbian:
Note that this simply embeds the image rather than trying to "trace" or convert it to a vector image, but this is something that may still be useful for developers. Some prefer to work with raster images anyway, and it avoids the problem that there's poor support for SVG Tiny. AFAICT, all of the processes described here involve non-free methods, or have known problems. The only method I've seen described for using bitmaps is this article, which requires the creation of multiple bitmap files and the masks, and editing of config files.
I hope this is useful to some Please let me know if there are problems - I've tested on Windows XP and 7; it requires .NET, which may need to be installed separately on older machines. The resultant images validate as SVG Tiny according to W3's validator, and work fine on my Nokia 5800.