Hello,
I launched a Kickstarter yesterday for the HamShield. This is a complete VHF/UHF radio transceiver shield for the Arduino that works in 3 amateur radio bands (144MHz/220MHz/440MHz). It also has a lot of frequency coverage: 136-170MHz, 200-260MHz, 400-520MHz. We got fully funded in about 24 hours, and backers are still coming in! The hardware is also open source.
We have FM voice and data working on the shield. It has a cell phone headset jack as well as audio plumbed into ADC and PWM (with filter!). This means you can generate tones, use packet radio, or even play audio samples back using the PCM library.
I have also written a HamShield library to control every aspect of the radio: frequency, sub audio tones, data transmission, voice control, tone generation, etc.
We are at our final design now, and everything is working great. Just need the funds to take it to production. I have done a few commercial hardware projects in the past and all is going well so far. We have 10 test boards right now.
You can check it out here: https://www.kickstarter.com/projects/749835103/hamshield-for-arduino-vhf-uhf-transceiver