We have been getting updates almost every 3 months, and now that the 1.8 version was released for the PS3 we can look foward to the 1.9 update...the question is when and what will it include, or do you think they will only release updates to "set up" for future DLCs rather than for bug fixing or added features?

I'm 99% sure we won't be getting a new update until Bethesda are ready to release a new DLC. That's the primary purpose of new updates at this point. I'm sure they'll fix a few bugs and such, but that likely won't be the primary focus.