Google has announced that Google+ will support Google Apps accounts within the next few days.
Google SVP of social Vic Gundotra said Google Apps support was coming "imminently" during a Q&A at the Web 2.0 Summit in San Francisco. Gundotra made it clear that "imminently" meant within the next few days.
The reason Google didn't launch Google Apps support during the original release of Google+ was because the company thought "it would have more time." Google+ beat their expectations, though, and has forced them to scramble on what is Google+'s most-requested features.