So glad you've found some of the resources on Community of value.
As far as listing your property on HomeAway, you can sign up here. If you're interested in advertising on VRBO (a HomeAway website), click here, and for Vacation Rentals (another HomeAway website), click here.
Questions about the differences between the websites? Here's a good HomeAway FAQ article, along with an interesting discussion related to the difference between HomeAway and VRBO.
Thanks for your interest in listing with us! Please let me know if I can provide any further information.
I can help you, but I've got a few questions: are you currently a HomeAway, VRBO, or Vacation Rentals customer? (To add you listing, you must sign up as a customer first.) If not, would you like to become one? This post should point you in the right direction...
If I've misunderstood your question, please let me know.