A post recently on the Yahoo Bioretention Group by Rick Stanford included a bunch of Rain Barrel sources:

” The Internet is full of design suggestions for rain barrels that are
different from the typical blue plastic barrel. For instance, see:

http://www.composters.com/water.php
http://www.cleanairgardening.com/rainbarrels.html
http://www.midwestinternetsales.com/rainbarrels.htm
http://www.rainsaverusa.com/
http://www.sprucecreekrainsaver.com/
http://www.kentuckybarrels.com/?gclid=CPXnxOT7oo4CFQ6NHgodM2a4Qg

and you can enclose them in various structures. For instance:

http://www.alternativetechnology.info/rainwater.htm

I’d encourage the folks you talk with to consider the larger concept
of rainwater harvesting, and suggest rain barrels as only one of a
variety of techniques that can be used. Another technique that is
often used, and doesn’t have the unsightly above-ground barrel, is
the cistern.

A whole pile of ideas and links can be found at:

http://www.ecobusinesslinks.com/rainwater-harvesting.htm“