Hey just curious if there are any plans for additional levels for the game? Any future add-ons?
Great game! I've been evangelizing it's goodness around the office.
You'd have to talk to Introversion about that – ASW only ported it.
As far as I know, Introversion have no plans to release additional maps of their own. However, they have promised that a map editor will eventually be released, which should open up the ecosystem a bit more. Additionally, it is possible to use the Darwinia map editor to make maps for Multwinia, but the process is a bit arcane, and installation is a chore (not to mention the fact that it is difficult to find anyone to play custom maps with at the moment). Give it some time, and we should see some more maps.