Personally, I’m holding out for the TED 5000 series to become available:
http://www.theenergydetective.com/ted-5000-overview.html
Meanwhile, I admit that the straightforward design and implementation of Black and Decker’s Power Monitor EM100B is quite appealing:
http://www.blackanddecker.com/Energy/products.aspx?WT.mc_id=BD00039
However, it’s an open question of which unit Vera would/could interoperate with more easily.