RE: Playsilks....Where do you buy them?
I would also recommend making your own with Kool-Aid. It is VERY fun. I even made some as party favors for DD's 4th birthday party and they were a huge hit.
I use a stove top method for dying though. Bring water with a glug of added vinegar to just below boiling. Turn it off. Add Kool-Aid to water and stir until thoroughly dissolved. Add playsilk to the water and wait until all the dye is absorbed. Either let it cool on the stove top or carefully pour the water and playsilk into a bowl in the sink and rinse thoroughly with cold water until water runs clear.
I think that the reds and oranges are the best colors. Also, there's a blue raspberry lemonade that makes an absolutely gorgeous sky blue. Pink lemonade makes a nice pale pink, but I usually add 2 or 3 packets because its a weak color. Regular (yellow) lemonade is VERY pale, but I overdye it with yellow food coloring and its OK. I have found the grape to make a faded purple, not a rich purple, but its an OK color. If you can find it, lemon-lime makes a nice lime green.
ETA: Here's a link for Kool-Aid dying. Just substitute "playsilk" for yarn and it works fine. :)
http://knitty.com/ISSUEfall02/FEATdyedwool.html
Beth, mom to older DD (8/01) and younger DD (10/06) and always missing Leah (4/22 - 5/1/05)