I had used Jing several times recently to create screencasts. I have been pretty happy with it as a tool, but I got a message from Jing that told me that I had nearly used up my monthly bandwidth. Basically, with the free account you get 2GB of bandwidth and once that's used up you have to wait for the start of the next month. Whew, it's almost Nov. 1. Luckily, viewing of my recent screencasts (LinkedIn for Finding Expertise and Searching for Expertise - LinkedIn Answer) will be pretty low over time.
Still the bottom line is that Jing works great, but it definitely is not something you can use if you plan to have more than a few people viewing your movies. So, as a blogger, you probably can't use Jing to record things.
So, I'm now back to searching for a free tool that works to create screencasts that I can use for my blog. I don't do it very often, so it needs to be free. The best thing would be if I could also do it while recording voice from myself and someone else. In other words a screen sharing tool with voice and screen recording. And it needs to be low cost or free.