awhile back, i was able to buy a new dahon curve (8 speed not the capreo) and here's how she's looking like right now....
1) added fenders (i was surprised that for this amount this bike doesn't come with fenders)
2) added shimano sora crankset with hollowtech bb and driveline cnc alum chainguard
3) change handlebar (black anodized)
4) added carbon fiber water bottle cage (66mm good for regular bottled water)
5) added selle italia signo saddle (put kore regular saddle adapter)
6) added topeak pocket pump on handlepost