Here are a few examples from simpliest to more complex:

PI One
http://pg.photos.yahoo.com/ph/lowgc/album?.dir=c310&.src=ph&store=&prodid=&.done=http%3a//pg.photos.yahoo.com/ph/lowgc/my_photos

PI Three
http://pg.photos.yahoo.com/ph/lowgc/album?.dir=c95b&.src=ph&store=&prodid=&.done=http%3a//pg.photos.yahoo.com/ph/lowgc/my_photos

JBL Cabinet
http://pg.photos.yahoo.com/ph/lowgc/album?.dir=c1b7&.src=ph&store=&prodid=&.done=http%3a//pg.photos.yahoo.com/ph/lowgc/my_photos

Garden Sub
http://pg.photos.yahoo.com/ph/lowgc/album?.dir=e3bc&.src=ph&store=&prodid=&.done=http%3a//pg.photos.yahoo.com/ph/lowgc/my_photos

The last one's an interesting build. An 1,150 cubic ft cabinet cleverly disguised as a shed. 3/4" panel braced every 16" with 2x4's, veneered with 1" thick bevelled pine siding. A peak-shaped top to minimize standing waves and isolated off the ground with six cinder blocks to reduce resonance. Roofing felt and asphalt shingles on top further dampens out vibrations. Porting is done through a ridge-top and soffit vents.

Gar.