Thanks guys. It's always nice to be told you're doing okay!
Apart from the original sketch (done with a shiny new propelling pencil on A3 paper these days, makes such a difference), all my work is done on the computer.
At present I'm only using Photoshop, though I have heard good things about Open Canvas too, must check that out at some point. I use the path tool for my lineart, and then stroke the path with angled paintbrushes. This gives a nice varied line, as well as keeping it lovely and smooth (I do use a graphics tablet, but unlike plain drawing, this
is something you can do with a mouse as well).
I found a very good tutorial on the technique
here, even though it's for a different style of graphic art.
What surprised me is it takes at least as long to ink it this way as it does by hand, but the end result is definitely worth it. I'm still playing around with it at the moment...