I have an entry about a startup I co-founded that failed on my resume. I also explicitly put in the description: "I learned a lot...from the business' failure."

I've been doing a lot of interviews lately, and most people are impressed that 1) I tried to start a company at all and 2) that I'm willing to admit that it failed

I would definitely keep it on there, as long as it was a good learning experience for you.