I got into digital music production about a year ago. I'm no wizard, but it is immense fun. Since I am an honest guy I actually purchase the software I use as well...
It's quite fun to use an old midi guitar controller to control soft synths on the computer, and make my guitar sound like a sick saxophone played by a drunken monkey (no wait, that's my usual sound!)
But seriously, I have had to catch up a bit on accoustics and the technicalities of MIDI (I thought those days were long gone!), not to mention waveshapes, oscillators and the whole circus.
I own two soft-studios (FL Studio and Tracktion) and a couple of synths (Native Instruments' Absynth 2 is wicked fun). I connect my guitar via a GuitarPort from Line6 and it uses software to process the guitar signal and simulate amplifiers etc. Great, great fun. But it's an expensive hobby...
It feels like hard science sometimes...keeping up with everything new on the guitar front. So some nights it's good just to sit down with the old accoustic guitar and forget everything about bits and bytes.
But if anyone feel like giving me a birthday present, make sure it's the Guitar Rig!
Tormod