Consumer Reports magazine, which is usually very reliable, seems to think well of Cheer Dark Formula.
http://abclocal.go.com/kabc/story?se...mer&id=4036866
Quote:
Putting Dark Detergents to the Test
By Ric Romero
March 29, 2006 - There's a new detergent that can help you with a phobia you may not have known you have - a fear of washing your dark clothes.
'Consumer Reports' just tested Cheer Dark Formula, which promises to prevent dark clothes from fading. Along with Cheer Dark Formula, testers also looked at Cheer Colorguard and Seventh Generation Free and Clear.
All three detergents contain special cleaning agents and little or no optical brighteners which can fade dark fabrics over time.
Testers cut swatches from 100% cotton black pants and fabrics and put together three separate laundry loads. Then the swatches were washed five times in cold water.
"We compared the swatches to see if there was any difference between the original fabric. You could only notice slight fading," Pat Slaven of 'Consumer Reports' said.
It turns out that all three of the detergents prevented clothes from noticeably fading. When it came to cleaning, cheer dark formula did the best job.
To prevent your dark clothes from fading too fast, you should turn them inside out while you're washing them and always use cold water.
Cheer Dark Formula also appears to be Goth approved:
http://www.detroitgothic.net/lofiver...php/t1513.html 
