Caterpillar Identification Please

[Scott Stephens]

I found a (giant???) caterpillar around Elgin Illinois that I have never
seen around this area before. Its around 2" long, 1/2" diameter and has
pairs of blue and yellow bumps along its length, with tiny hairs or spines
growing out. It sort of looks like
http://www.insect-world.com/images/lepidopt2/empmoth.jpg but not exactly. If
it matters I can scan a picture of it. Please E-mail any replies.

Can I sell it?
Can I feed it and watch it hatch into something with really big wings?
Can I eat it? Got any recipes?

Thanks,

Scott