This is for now just a bucket with helpful resources:
- http://create.msdn.com/en-US/education/catalog/sample/primitives
- http://forums.create.msdn.com/forums/t/7414.aspx?PageIndex=4
- http://jtfeck.awardspace.com/
- http://www.bit-101.com/blog/?p=2832
- http://blogs.msdn.com/b/manders/archive/2007/01/07/lines-2d-thick-rounded-line-segments-for-xna-programs.aspx