Using MovableType?

piecewise asks: "Everyone seems to be using a Webblog these days and I'm interested in getting my company into it in a big way. We have three web servers and use Akamai to keep the website cached and happy. How many Slashdot readers are webloggers? Have you used MovableType, on a large scale? Are there any security issues? Security's very important. Is there a solution to the 'cache problem'? In other words, as people input messages, might the data running across the net become out-of-sync? Thanks for any thoughts/experiences."