I wanted to bump this thread for two reasons.
First, an expansion pack was announced: XCOM: Enemy Within
It's very much a Firaxis-style expansion, expanding the content of the main game rather than adding an additional story. They are adding mechs and genetic engineering on top of everything else. In addition, there's a new organization called EXALT that are humans who want to use the aliens for their own gain. Here's a video of a mission against them
along with covert spy stuff.
The second reason I'm bumping the thread is to ask a question for those who have more experience with the game. I put the game down for awhile to do other things, but I'm finally taking a stab at playing through the whole story. I'm at the point of the base assault. However, I feel I need to build up my troops (and hire some more troops) as well as get some important research done. On the other hand, the missions seem to keep getting harder and panic is obviously increasing. So my question is this. Is it better to just advance in the story and hope the pieces fall where they may or should I take a time out from the story and just run some missions so I can be stronger when the time comes?