I have just discovered (thanks to today's XKCD) 2048. It's a very addictive puzzle game that you can play on your computer or mobile device. Click here to try for yourself!
I've since introduced the rest of the family, and a cross-section of my Facebook friends to the fun.
Here is my best score to date - check out the 1024 tile (not, however, the eponymous 2048 yet)!
Enjoy and - when you're ready to complain because your whole life has fallen apart - read the second sentence again and don't say I didn't warn you!