Monday Mutant 32: Cross the Streams

Shade in some cells black such that the black cells are all connected to each other through their edges, and no 2x2 cell area within the grid contains all black cells. Numbers to the left of a row or above a column represent the groups of consecutive black cells which are in that row or column. For example, a clue of "3" means the row or column has three consecutive black cells, and a clue of "3 1" means that the row or column has a group of three consecutive black cells followed by a single black cell, separated by at least one white cell. A question mark (?) represents a group of consecutive black cells whose size is unknown; an asterisk (*) represents any number of unknown groups of black cells, including none at all.
If you're a fan of today's Monday Mutants, I've created a 25x25 Cross the Streams puzzle which might appear in issue 9 of Sudoku Xtra. Can't be too sure, though, since Dr. Gareth Moore seems to be a little late publishing issue 9 this month. (Edit August 3, 2010: Sudoku Xtra 9 is now out, and does indeed contain my 25x25 Cross the Streams puzzle, in addition to two other puzzles exclusive to the magazine.)

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