Getting sound out of an iPhone and online quickly has been pretty easy for a while, and there are a number of startups playing in the space. Trottr works from any phone and is a simple call-in or upload system. The Tweetmic iPhone app has been gathering lots of speed in the U.S. due to its ability to publish on Twitter – but it has no attached social network. But it’s AudioBoo.fm, launched in December last year, which has been making waves with an iPhone-only app which works very well.

However, a new entrant, ipadio, is potentially about to steal AudioBoo’s thunder with a new iPhone app which covers all the bases: live streaming audio into a web page; high quality uploads from the iPhone; live phone-in service; upcoming Android app – plus, crucially, a business model.

Released to the public at the end of April the existing iPadio iPhone app is simple enough. However, not unlike BlogTalkRadio, it was based around making a phone call to get your audio online. But the new version of the existing ipadio iPhone app [iTunes link], poised for approval in the App store, brings a ton more functionality to the platform.