i loved crossing the road in HCMC. I was scared the 1st time I encountered it but then i saw 2 local kids playing by the side of the road and they actually ran onto the road.. the bikes just rode past them like nobody's business. All you really need to be aware is your personal space say 2m around you. Walk at a constant speed and the bikes will ride around u. I find ladies and older guys drive slowest. Teenagers are faster, but its ok lah
I stayed in HCMC for 4 days, which is a bit much cos the last day i'm itching to go back Singapore liao... also if you can go back hotel room to rest 11-2pm as the heat is really tough to stay out. Its a unique city with friendly ppl! drink plenty of the coffee, its the BEST.