I have:

* washed dishes whilst feeding DD in the sling
* taken clothes in and out of the washing machine with one hand
* organised most of DDs christening on the phone while DD was feeding - get time to actually sit down and do it and she is quiet - double bonus!
* lots of typing - some one handed and if I can get her into the right hold then back to touch typing
* walking around shopping centre, DP pushing trolley, me pushing pram and holding DD whilst she feeds

Um there are others but that is all I can think of right now