After I did some more research on everything, it seems that I should continue with either geda or kicad for my future designing goals, rather than Fritzing. I do plan to keep an eye on Fritzing and how it grows; it does seem like an easy way for beginners to get into things, and since it outputs Gerber, it won't lock you into their stuff (they have plans to allow you to upload your board design and have it built/stuffed and mailed back to you).
But - I've already played around with gschem, which is part of geda; I did a preliminary design of my h-bridge with it, just to play around, several months back (long before I found Fritzing). So I am thinking of going with the entire toolbase there - or Kicad, or a combo, or something. I don't want to be locked into anything, and I don't want to be limited (like it seems I might be with Fritzing).
Something I did find, though - which I don't quite understand: In the geda toolchain, there are several symbol sets for various transistors, but none of them were a 2n3055 NPN - however, I did find footprints (for the PCB layout, I think) for a TO-3 case (actually, they were marked for the 2n3055) transistor. Do I need to still create a symbol for the transistor, or do I just use a regular NPN transistor, change some attributes (so that on the schematic layout it is defined as a 2n3055), and then in the PCB editor bring in the 2n3055 footprint - and it will "magically" (or maybe with some massaging) work out trace-wise?
Then again, maybe I just need to redesign my h-bridge away from the 2n3055 (go with a power mosfet design or something)...
