Well, I don't.
But, I have learned a few things along the way.
#1 don't be scared of it...because I was.
I will never forget walking thru the "ethnic" hair care aisle and asking my first african american foster child "Does any of this look familiar to you?" He was 3 years old at the time...he wasn't much help :)
#2 everyone uses/does something different.
After going through the "ethnic" hair care aisle with my 3 year old and picking up the most natural looking product I could find, I still asked any african american woman that looked approachable what they would use.
They would usually say "Just get some grease from the dollar store...they all carry it." Little did I know that "grease" usually does not literally say "grease" on the bottle.
#3 you probably are not going to ruin their hair. probably.
I have used several different products on my kids and I haven't ruined anyone's hair yet. My newest little girl just came back from her mom's house and I can tell her mom used baby oil in her hair and I was surprised that I kinda liked what it did to her hair...even after I messed with it.
All this to say...I have really appreciated any help I could find in this area and one of my "soon to be" fellow foster moms has a great blog about her daughter's hair that has given me some great ideas! You can find her at http://bellescurls.blogspot.com/
I would suggest brushing up on at least a couple go to items/products if you said you are willing to take any race! You never know who you are going to get and I would much rather have mom saying "At least you tried" than "Why didn't you do anything with her hair?!?!"