DS is 18.5 months and still not walking. He can pull up easily and cruises a bit, but not loads. I've been supremely unconcerned (DP allegedly didn't walk till 22 months, so I figured it ran in the family!), but one too many concerned phonecalls from relatives has made me wonder if I should follow it up.
FWIW DS sat relatively late, started commando crawling at 12 months and proper crawling at around 16 months. He also bumshuffles occasionally, just for a change... He doesn't appear to be in any discomfort when he stands.