Today’s featured promo on MacUpdate offers Mahjong Solitarus for US$9.99 (41% off, retail $17). “Most Mahjong solitaire players suffer from the same problem: once they’ve completed all levels, they run out of fresh layouts to play. Now, with Mahjong Solitarus, your experience is only limited by your imagination, and the imagination of other players! Mahjong Solitarus features 5 exquisite tile sets enhanced by a fully working layout editor that allows creative players to share custom layouts over the Internet. The possibilities are virtually endless, and you’ll probably never run out of new levels to play.” Mahjong Solitarus requires Mac OS X 10.4 or later.