Originally posted by: Laserschwert
the way, make JPEGs, then the upload won't take that long ;-)

NOOOOO!!!

Whatever you do, do not -- I repeat: DO NOT -- make these things JPGs. The JPEG format was not designed for big blocks of solid colours, and will actually look worse and increase the size of the file over PNG.

PNG is lossless, but compressed, which will give you exactly what is put in (unlike JPG), and will be nice and small. Line art like yours will compress to a huge degree.

The best idea is to convert to PNG before uploading. For example, the title card graphic you posted is just 23kB as lossless PNG. It is impossible to create a JPG with that quality and that size. BMP is a terrible choice for uploading, because it is uncompressed. Each picture would probably be about a MB, I'd guess? Boo...