For the past few years, we’ve had to go through the same song and dance: gather device IDs, create ad-hoc builds and then try to explain to users how to install them via iTunes. This can be trying for even technical users and non-technical users can get totally flummoxed. Let’s not even talk about people on Windows where the files often unzip in strange ways, leaving them totally confused.
Thankfully, Apple has made incremental improvements to this process over time. iOS 4.0 brings Web-based, wireless distribution of ad-hoc apps and the ability to embed provisioning profiles right into the IPA bundle. Your beta users can now install the software without ever using iTunes at all!