The folks at BGR have published the full changelog and for the most part it looks like iOS 5 beta 5 offers bug fixes and improvements in stability, rather than new features. But there are also some known bugs still affect the preview version of iOS 5 and Apple will likely spend some time fixing this before the release of the software to the public.
Just like the previous beta, users can download iOS 5 Beta 5 as over-the-air update over WiFi or 3G. Or you can use your iPhone, iPod touch or iPad to a computer with iTunes to download and install the update to connect. You need an Apple iOS developer account to get the latest beta of Apple's developer portal though.
