Hi Boxer - congratulations on taking the dive into recording your creations. Most desktop mics are OK for just speaking voice - they are condenser mics which means they hear everything surrounding them - and the range of quality sound is limited. To get started, a basic desktop mic might be just the thing.
I decided to go one step further when I took the plunge into home recording. I got a Snowball mic by a company named Blue. This mic plugs right into the computer (USB) and requires no external power. It has 3 settings (cardiod for up-close, limited for loud sources, and condenser for full room recording). I like it - I use the 'up-close' setting mostly and am very pleased with the results. It cost about $100 US.
As far as software, there is Audacity - an open-source package that can be downloaded for free (just Google it). If you are using a Macintosh computer there is also GarageBand which is very versatile. Hope this helps - James
"That darn Pythagorean Comma thing keeps messing me up!"
[url]http://en.wikipedia.org/wiki/Pythagorean_comma[/url]