We just bought some Flintstone chewables for my son and they taste awful.
I take the Emergen-C Multivitamin, which is liquid. (and yummy) It's not as comprehensive as some of the other multivitamins, but it's fine for what I need, since I eat a pretty balanced diet overall.
When I find myself consistently falling short on calcium, I have Viactiv chews.
For iron, I try to get in a bowl or two of Total cereal over the course of a week. So far my iron levels are fine. (just had them tested recently)
The maker of my kids' gummy vitamins (which are yummy) and my favorite probiotic (PB8) just introduced a new line of adult gummy vitamins:
NNI Adult Gummy Vitamins I'm going to try some out whenever I happen to run into them locally.