[Lurking Libertarian]

John Bolton was appointed in August, 2005 and his appointment ended when the new Congress convened in January, 2007.

...yes, not in January 2006.

[wagglebee]

Correct, the next Congress was seated in January, 2007 after the 2006 elections. If Obama makes a recess appointment now, the next Congress begins in January, 2011.