Google+ has only been available for a week and there’s no Google+ API as of yet, so developers have been making do without, and this is the latest example.
A developer called Kosso has created a streaming video hack for Google+.
Kosso’s hack is called Plusbar and takes the form of a bookmarklet. Plusbar currently adds streaming media from Amazing Radio, DFH Radio, Grooveshark, BBC News and TWiT into a box above your Google+ stream.