If your baby won't eat solids, or doesn't eat much solid foods, vitamin drops are a good alternative, as is concentrating on iron-rich foods. And that 6 months thing is really just a guesstimate from the medical establishment.
I thought you are supposed to start solids no later than 6+ months, because of the lack of iron in breast milk. Is it bad to wait much longer than that? How do you get your baby iron if he's not eating much for solids?
The only reason to start with cereal is that cereal is fortified with vitamins and minerals. Aside from that, it's pure starch. Not the healthiest stuff! If you want to start with fruits and veggies, you should feel free to do so, particularly if you choose to give your baby a vitamin supplement.
And, I was told by our pediatrician to start with all of the baby cereals (rice, oat, barley, and wheat) before moving on to other foods - like veggies or fruit. Is this not the case?