I agree with the above opinion that dedicated assembly applications do not have much of a future, so don't bother learning them. Dedicate your energy to mastering Illustrator. The basic functions are still the same since the 80's, and you can't argue with that for longevity. Deskpack adds trapping features that make Illustrator even easier to produce in, although you can get by (with years of practice) without Deskpack. CS4 makes Illustrator even easier to use, with Deskpack, or without. The big feature improvement is the separation preview, and more sophisticated Appearance functions to help build spot colour objects that can be globally edited. It makes conversions to Hex and Opaltone a straightforward procedure (almost). After opening many legacy files from years past, it is a pleasure to find a job was done in Illustrator and only needs to be resaved to a current version.