To this end, we have started posting a set of two tsumego problems (one easy, one hard) in our social media accounts (Facebook and twitter) every Tuesday, around 15:00 UTC. The solutions are available a week after posting the problems. For now, the hard ones are not "specially" hard.
This is the second week, so the imgur album holding the tsumego is still a little empty. But if you remember to check it in a few months, it will hopefully be full of interesting problems.
To generate the game diagrams and animated solutions I used the modified version of sgftopng I wrote about elsewhere. I need to polish a little the source before making it available to anyone else (I did several quick hacks that I'm not happy about, I'd like to comment my changes, pull some interesting stuff from version 0.18c since I used 0.15b and improve the hand-drawn generator), but I'm in contact with the creator of the sgfutils package so the changes can be used by anyone in the (hopefully near) future.