Well, this topic is almost a year now, but as i ended here looking for some HandStand tips many people may too, so its a good topic, well i've been trying to handstand for some weeks now, and i think i got it pretty good now, i can maintain my balance for more than 10 sec's, and walk 7 or 8 steps now, the main problems to an Handstander are: Fear of falling forward on the concrete, lack of strenght in the abdominals and adjacent muscles and lack of strenght on you fingers, but you can eliminate thos problems very fast with this routine:
Jog for 10mins then try to handstand for the long possible, walk if needed what we want here is to get power to the abdominal and adjacent muscles, continue to run for 200M then do it again until you are dead tired!

do it on the bank room, do it on the street when nobody is looking, do it with your girlfriend on top, the key is repetition, k wish you all luck see ya