I dont think a port will be too hard provided LFS comms are not encrypted. I havn't actually looked, but usually I can reverse engineer one half of a network puzzle pretty quickly and as the LFS Server isn't doing anything too complicated I actually think a linux port would not be terribly difficult to do, but like you I wont even think about possibly considering this until S2, or possibly S3, goes final.
I do think that a linux port is a genuinely viable option though, and being a 3rd party application it could be expanded a lot further than the LFS Dedicated host and do a lot more things.
If I where to undertake this project though i'd want to make it donation ware or shareware though, because it's a technically very challenging process to make - I dont think it would be unfair either as being a dedicated host it's going to get used on 24/7 servers in data centres and it would save server operators a lot of money by giving them the linux option instead of windows, as Linux servers are a lot cheaper to rent.
But I lack the skills to properly support linux, it just isn't my forte.
