Running out of IP Addresses

I'm sure this is a common question and I apologize for being an idiot, but that's my God given gift, so I guess I can't complain. Things were running really nice here for the last 10 years, one subnet was MORE than enough IP addresses. Then we got two carts of iPod Touches. That's 80 IP addresses...yes, yes, I know, why put them on the Internet? I could go into a whole RANT on that, but I won't bore you. Anyhow, the 80 IP addresses that get sucked up are making some laptops self-assign IP addresses. (Took me a whole hour with Apple Tech Support before >>> I