Welcome, welcome!

For carpal tunnel, I recommend a Wacom - they do wonders, since it's less of a forced position - and personally I got myself a trackball, because mice were causing me such pain I thought my thumb was going to fall off.

As for the maps, I think the rules are generally: ask politely unless someone explicitly allows it, and even then dropping a little thank you comment will make everyone feel that much better and give you a dose of good karma.