It's still legal in the USA. The main reason it was done was for cockfighting ... which is now completely illegal in all 50 states as of 2008 (Louisiana coming in last). In 33 states it's an actual felony. The second reason it's done is because it's "good for frostbite prevention and injury from flock scuffles". The third reason it's done is because some chicken breeds are required to be dubbed in order to qualify to be shown in a poultry exhibit/show (much like ear cropping, tail docking, etc on dog breeds).
So yes, Ideal Poultry can perform these procedures on baby chicks. They provide:
debeaking
dubbing
dewing (this is not clipping wings, this is removing the actual bones of the chick's wings to prevent any flight whatsoever)
The comb helps the chicken circulate blood faster...controlling body temp, etc. It also is a really good indicator of health issues based on the color of the comb.
[Edit] I edited my post to remove all my angry personal feelings regarding the procedures and stick to the facts instead...that wasn't easy. I will say, however, that I will never be a customer of Ideal Poultry.