Tall bikes seem to be region specific.. There are a lot of ways to do it, and each region seems to have a few techniques that are specific to that area.. There are a modest number of tall bikes in St. Louis now, built with a general sort of platform that works for us. Here are a few pictures to get your juices flowing.
Notice the two bikes, male bike on the bottom, and female on the top (precious junk protection). Notice that we lower the back brake to the chain stay of the bottom bike, instead of the seat stay. Notice the three speed hub (and grip shifter, in this case). Notice the gusset at the seat tube and bottom bracket. Notice the 24" front wheel and 26" rear wheel to improve geometry. Notice the repositioned dropouts on the fork and rear triangle to allow for more trail and adjustable chain tension. Notice the capped bottom dropout. Notice the bored out BMX chainring. Notice the 'three leading three trailing' spoke lacing goodness. These features and more are to be found on the wonderful St. Louis style tall bike, and have led us to victory against such challengers as Cyclecide circus.
What techniques do you employ? What keeps your tall bikes rolling day in and day out?