When blogging, you sometimes find like minds and link them, but you usually never meet them. I just found out that a person I know in Second Life named Osprey Therian found my blog and linked to me. Check out her site and see some of the pictures she's taken of recent events in world, including some nice pics of my parrots and some scandalous pics of a male dancer.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.