Ever wanted to learn how to use regular expressions but always thought they looked too complicated?
'In the Woods' are doing a series of tutorials on how to use them.
Day 1: http://blog.themeforest.net/screencasts/regular-expressions-for-dummies/
Day 2: http://blog.themeforest.net/screencasts/regex-for-dummies-day-2/
Day 3: http://blog.themeforest.net/tutorials/regex-for-dummies-day-3/
Day 4: http://blog.themeforest.net/screencasts/regex-for-dummies-day-4/
For most of the tutorials they have a quiz at the end, just to make sure you were paying attention! (It also gives you an insight into the topics they'll cover)