Just looking at this now as I search for an answer to the same problem. I’ve been doing “cascading combo boxes” as they’re called in MS ACCESS for years so am very surprised there doesn’t seem to be a plug-in that can handle “cascading taxonomy select dropdowns” for the front end in wordpress. To make matters worse I’m running into many inconsistencies in the wordpress community as to what to call them…Please do let me know if anyone finds or develops a solution…thanks!
