Five iDevices later, I have this old iPhone 3G sitting here doing nothing at all. I don't want to give it away, and its worth all of about $2 to the trade-in services. I thought about jailbreaking it and experimenting with everything available on Cydia. However, that jalibroken phone will then be a security and privacy risk, so I don't want to give it my wifi password. It'll be essentially useless without network access. I also remember someone had gotten a mini Linux up and running on a 3G, but I never heard anything else after that. So what can I do to get some good use out of this old but still very capable iPhone?