I haven't heard any plans concerning Munch or future instalments in his story. That's not to say there aren't ideas but everyone is focussed on Soulstorm right now, and we will be right up until its launch.
As for the progression of Abe's story, I don't have any insider info on that, other than to say we love Abe too, and we're well aware that he's our most loved character so, to me at least, it makes sense that he would be a logical focal point for future games. Let's see how Soulstorm's story finishes up though - remembering that there's a lot of rewriting going on for that - and then we'll see what makes sense for subsequent games.
@HOMINIX - I'll make sure nobody forgets about Squeek when we're discussing ideas for the future
@Varrok - some of that lateral movement to "latch on" is probably necessary to compensate for Abe's more analogue motion in NNT (I assume) but I can promise you that there are some very talented people at Frima and I've seen some of their animation work already, it's looking very smooth and natural.
@Vlam - More fan interaction is something we're going to try to get Lorne involved with throughout Soulstorm development, when we can tear him away from everything else he's got on his plate. Everyone is incredibly busy and we have to make the most of what time we have to schedule for interviews but some kind of interview or Q&A with all you guys from OWF would be really cool to see. Maybe we can sort something down the line.