heres an update on thinking (i think it might help others to)
make Price Weight
rob engish frame 1320£ ?£ (but i bet its light e.g. 1.5kg)
montague 299£ 2.7kg
slingshot fold tech 280£ 2.7kg
slingshot ripper 500£ 2.3kg
ibis tranny 1300£/1400$ 1.3kg
breakaway 3500$ 1.6kg
ravello cheap option 500£ 1.46
(carbon ebay frame)
full bike only
montague biframe 80-130£ 14kg
(what i currently have)
dahon flo 2000£/2800$ 10.3kg
lapierre passport ? 12kg
seperable modification
ravello 500$ .160kg
S and S 400£ .3kg
packable full suspension mountain bike
turner 5 spot
cc helious travel
swanee litespeed
i will start a thread here "full suspension frames that fit in a suitcase"
CLownbike, Im gambia so 18" tyres are about not avaible, i have found the occasional 24" fyi to others replacements for airnimal might be possible.
feijai, as mentioned i prefer the ride of 26" over 20
fietsbob, i like your creative thinking however i cant ride a unicycle, i would learn but ive heard they are slow 
reverborama here are some uk suppliers for the frame your after
http://www.foldingbikes.biz/html/montague_x5_tora.html if i were you id consider the montague biframe and the slingshot frame avaiable here , or buy any 7005 bike frame you like and speak to ravello about having them make it seperable
Last edited by thatsut; 05-14-11 at 05:47 AM.