K.,
I found the book "Toilet Training in less than a day" to be very helpful. You can find it online with amazon.com or barnesandnoble.com. eBay may have one, too.
You may have heard of mothers potty training their 12-18 month old children. People define "potty training" in many different ways. If you are willing to take your child to the potty and do everything for them for the next 6-12 months, then it is fine to try to potty train them now, but it still may not work.
For your child to be completely potty trained, she must be able to read her body signals, follow directions from you consistently, dress and undress herself, and have the bladder control to hold it for at least 15 minutes. If she cannot do all of these things, then you can train yourselves and take her out of diapers, but SHE won't be trained.
Many people say to wait until the child shows interest. This is good advice to a point (age 2 1/2 or maybe close to 3.) But there are many frustrated parents out there with children 5-6 years old in diapers still waiting for their child to take the initiative.
Best of luck,
S.