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I have my fungadget off the year in today. A little late, because I had to wait longer then expected, but boy is this a fun thing:
Holga 12S Flash. It runs on one AA-battery and looks good functioning. Guidenumber is 12 and it covers my 31mm lens very good (leaving room for weider, but I don't have that). It gets its signal from the middle-point off the hotshoe and only has one flashstrength. Wich works well for 3 meters and iso100, 1/160th and f4.5.
Toy little colorscreens are on it and they make fun. So WB on flash and just a filter infront off the flash. Could also give warm tones to your Black and White images.
Holga your world!