Sharing test apps with fellow developers on my project

In my provisioning profile, I have my iPad, and the iPads and iPhones of my fellow collaborators. Is there a way I can send them my test builds?

When I was using Flash, it actually generated an .ipa file that I could drag into iTunes like any other file. If it was generated with a valid provisioning profile, I could send it to my colleagues.

Is there a way to share a test app generated via Unity/Xcode?

Thanks!

you can host it at webpage and they can click the link from device and install it without itunes