I hate RFP's (request for proposals). Why? Because it is a big song and dance 90% of the time. Typically a client that is looking for an RFP has the following characteristics:
1. Is looking for cheap labor and is seeking a bidding war to get a good deal.
2. Is still unsure about what his/her goals are and so has unclear project definitions.
3. Is usually a cold-lead, which I usually pass on.
When I was first getting started I chased down every RFP I could. Killing myself to get every detail right and then I waited, waited and waited for a decision. What a nightmare.
So when I get emails from web sites screaming about how awesome the RFP process is I laugh my ass off (LMAO). Because all the people that answer the RFP are doing nothing but turning each other into a commodity.
This is why I like sites where I can be contacted one on one or sites that allow me to contact businesses directly. That way there is no "hiding" behind a silly RFP tool.
This is just my perspective. Feel free to share yours folks.