When I have completed the shivan nebula campaign (cappella campaign will be soon after) I'll get to work on the new weapons, and as said before, I'll make them optional. Because there are new weapons, I will have to modify the missions to allow them, so a re-download of the campaign would be needed for it's use. By default however, the campaign will be balanced for traditional shivan weapons, not the "fun" weapons (I might redo them post-release though for the fun weapons).
If I, for whatever reason can't get them to work, I'll try to enlist a team to get them working (not yet though). Also, I havn't been able to find a disclaimer anywhere on lightspeed's site......... I would feel more comfortable knowing for sure if it's alright to use them

Oh, a quick update on the actual campaign status: I've been working on mission 5 like a mad man, and it's very difficult (not impossible). Lots of ships (nearly BoES) and lots of fun

Unfortionetly, it's taking

of time. You wouldn't believe the amount of bugs that were in it

But it (mission 5) should be 100% sometime today. I'd estemate that within the timeframe of 2 weeks that the nebula campaign will be released (DO NOT HOLD ME TO THIS DATE! It's a guess that's not accounting for possible major problems).