I know myself Steve, when I'm shopping online, I want to shop online, I move on when a website asks me to call for pricing or anything like that. In all honesty, I don't have the time or the desire to call, sit on hold, be pressured when I'm still looking around and comparing prices etc. If I have the pricing and info I may call to purchase, but I still prefer to do it online.
Same goes for cars, when I was shopping for my Lexus I was really overwhelmed by the number of these internet buying deals and dealerships with internet sales departments that wanted to contact me over the phone. I was like, no I don't want to talk to you on the phone, no you can't call me on the phone, I submitted my request via email, thats how I wanted to communicate. Several places no longer wanted to do business with me via email and just stopped responding to me. I would submit requests and specify "CONTACT BY EMAIL ONLY OR NO DEAL" and they'd call me and wonder why I never called them back. I actually wound up spending $250 more for the car because it came down to two best offers, and the dealership I went with was perfectly respectful about my desire to do business over the Internet and not the phone or in person, and the other kept calling and pressuring me. I never even spoke to my salesman until I showed up to take delivery.
To me, if you're going to do business over the net, then don't expect or force those customers to call, odds are they wont.