Yep.
A lot of us have used this site as our baby food bible. You can take as much or as little away from it as you want, but we followed pretty close and Lily now loves EVERYTHING and lots of it! (I'm sure some of you remembered when I was worried about how she wouldn't eat almost anything in the beginning).
http://www.wholesomebabyfood.com/readyforsolids.htm
Signs of solid readiness:
1. No more tongue thrust reflex
2. Ability to sit up unassisted
3. Ability to show that he is full (by turning away or refusing the bottle)
4. Interest in what you are eating
5. Doubling of birth weight
6. Frequently waking in the middle of the night when a solid sleeping pattern had been established. This may not be the best indicator that your baby is ready for solids. Please keep in mind that a growth spurt will occur between 3-4 months of age, 6-7 months of age and also 9-10 months of age. Baby may also be waking due to an illness or teething.