Best Social Networking Sites to Market a Client's Business/Website

[MarketMaster]

I'm a huge fan of all that social networking sites have to offer in terms of free promotion for a client's site. As such, I wanted to start a thread that listed the BEST social networking sites to promote a CLIENT'S business. Obviously the web2.0 sites listed should be used in CONJUNCTION with a client's site in order to maximize exposure and build a stronger web presence. I'll start the list, but please add on:

EBAY - Really obvious, but people overlook it frequently. For the right types of clients, online stores can be very helpful

MYLOCALSPOT - Like a MySpace for small businesses. Create a free profile with pictures, business description, products/services list, current specials and a link to the client's site.

CRAIGSLIST - Again, often overlooked. Millions of people search it, and you can really hit a great niche audience. Better for service based business clients, but definitely worthwhile.

SQUIDOO - Make a webpage to hype a client's site/business...or...use it to hype a current promotion that a client is running. Very cool.

[Ronald Marva]

Social networking is changing the way we do business online. For those who operate a shopping site, these resources that you have provided will be useful in building up their network and business. Personally, i have taken note and expect to bump into each other in these sites.

[Richard Guy]

I enjoy networking through Craiglist. I will definitely try out the other entries that you have listed.