We know somehere between 85 and 95% of home purchasers begin their search and begin compiling much of their information from the internet, using sites such, Trulia, Zillow and Cyberhomes.net.
A word of caution to the consumer....those sites can be miselading if not completely erroneous. You will be far better served if you find a realtor in the specific area you are searching and ask that person to provide you with the information you need to have.
While making some comparisons for a client that had used two of those sites mentioned above and then compared their results to my own Paragon Multiple Listing Service I found differences of approx $200,000 on homes priced at $450,000. In one case (Trulia) had submitted very nice pictures, but they were of the wrong home.
Buying a home is definitely a process of gathering the information you need to to make a good decision. The home buyer is committing way too much money to take a chance on not getting it right.
There are so many good referral programs out there, the buyer can almost start anywhere, and become connected to a professional realtor in any area they may be looking.