Check out the repstrap documentation - basically it's a low-cost reprap built out of scavenged parts . By using anything you have to hand, it keeps the costs down.
There are some good RepStrap blogs out there - they've got good ideas and a description of real-life building, for example
[
copycatbot.blogspot.com]
The software will run happily without being connected to a RepRap - the java host software, and the skeinforge toolset will both run, slice 3-d models, and you can view the generated toolpaths. That's a good (free) way to get started.
Designing objects for thingiverse is a really good way of contributing - anything 'cool' or practical will almost certainly get printed by someone, and you'll probably get some photos and comments of the printed object. It also starts to free your mind of the normal constraints from 'normal' manufacturing (e.g. complexity - free! complex curves - easy!) as you no longer have to worry about how the object is produced .
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Reprapping blog and other rants: [
renoirsrants.blogspot.com]
My Reprap: [
sites.google.com]