Okay, let me start by saying, this isn't saying they're DOING it, or that any of these should be taken that seriously (though, Mr. Bobin, Bret or Jemaine - if you are reading this, my idea juices are yours to thief

) - but after S2 ended - which, if you haven't seen how it ends yet, I'd suggest you stop reading this thread now - as some of these ideas will probably give you major hints about how things in s2 ends.
So my major idea that I've had since seeing the s2 ending was that at some point (though I thought it'd also be funny if there was an episode or maybe a few set back in NZ and we find out that Bret and/or Jemaine have like...WIVES or something...that'd be hilarious to me anyway), is that they try to get back across the border. I can see Bret with his little piano and guitar, Jemaine with his guitar on his back, Murray in a sombrero (though, as a diplomat for NZ he shouldn't be banished like Bret and Jemaine probably are - he's just there to help the guys out). Just how awkward and hilarious would it be seeing the three of them (Bret in his red penguin outfit, Jemaine in his denim Texas Tuxedo, Murray in his green on green ensemble) running with a large group of Mexicans to get across the border. Also - maybe a security guy on the border could catch them once and then after hearing the guys talk be like, "That doesn't sound like a Mexican accent" and Bret/Jemaine/Murray could say, "We're from the US" or something and have the guy say, "Whereabouts in the US do they talk like THAT!?" and they could say, "North Dakota" or something like that

On the way to work I was thinking about the border running idea some more and came up with all sorts of hilarious one liners and whatnot...also - they could fit Stana into the series by having them meet some weird creepy Texan dude with a big ol hat who sits them down to tell them about this bad man, Stana, who some people think is only a myth, but he's sure he exists because he was molested by Stana once

or something like that *shrug*
Maybe all of, or a significant part of s3 could be the guys as they hitchhike rides back across the us from Texas trying to get back to NYC. And all the interesting characters they hitch rides from/come into contact with. That would also give them (hopefully) lots of idea fodder for songs...
I have all sorts of ideas for s3...hear that Bret and Jemaine? I HAVE ALL SORTS OF IDEAS

Let me just finish by saying that I just want the guys to do what they want to do, this isn't me advocating for a s3, this is just me throwing out some ideas I have for it IF IF IF they decided to go through with it...feel free to add ideas here
