Yes, I do get paid for some of my posts. Some are simple links, some information and reviews about sites and services. It's fun. It's easy. And I've found lots of interesting sites I wouldn't have known about otherwise - unless I read about it on someone else's blog! (for which they would have gotten paid instead of me)
Follow any of these links for more information on how you can do it too:
I don't always specifically mention that I'm being paid for a post, but you can always tell. Starting this month, I tag all paid posts with a date. For instance, all paid posts this month will be tagged with '01/08' - next month '02/08' - and so on, so check the labels. It's also a good way for me to easily see how many paid posts I do every month.