Starcraft Q&A updated

We're now up to Starcraft II Q&A Batch #41. Here is a summary of the points that stood out the most for me:

1. Vespene Gas collecting is more complex in Starcraft II. You can invest minerals into different gas refining technologies that would increase the rate you extract gas from the geyser

2. It seems Zerg defensive structures can move position.

3. Dropships will be better this time around encouraging Terran players to use them more than previous games.