Friday Puzzle #60 - (h) ORu KakurOh!
Unfortunately 2009 did not have a new kakuro variation (maybe people were still recovering from the eight puzzles thedan and I sprang at the 2009 Mystery Hunt) but here's hoping 2010 brings more fun.
Instructions: This puzzle is a combination of the 2007 and 2008 Kakuro gimmicks on the USPC. Each entry uses one of two possible choices for the sum of the numbers in that entry. Some large cells (in light gray) belong to multiple rows and columns but contain just a single number. The puzzle otherwise follows standard kakuro rules (enter a single digit from 1-9 in each cell, no digits repeat in an entry).
I'd rate this on the X-treme end of things, to match the X theme, but it is not impossible by any means.