Originally Posted by kludge
im thinking about building up a single speed 'city' mtb set up or a 24 inch(or is it 26 inch?) cruiser frame.
Two (actually three) options here: 24" wheeled BMX cruisers aren't too common, but you can find them in shops. 26" wheeled BMX cruisers are exceedingly rare, but you can find them online. SS MTB's are a little more common, but online is still your best bet.
Good observation on the aestetic trends. I am still following my 80's style of bikes, bolting on whatever it takes to make the thing roll...