You Design I Code .com

DesignOutpost.com
DesignOutpost is interesting. You post your design need as a project and freelance web designers makes mockup designs. From those, you pick the designer that you want to work with. eLance.com and Guru.com
eLance.com and Guru.com are a couple of well-known places where you can find professional web designers and freelancers to work on your project. You can post your job request and firms, web designers, and freelancers will bid on your project. You choose who you want to work with. Other Freelance Web Marketplace
Some other similar websites where you can find freelance web designers and developer are ...
FreelancerStore.com
eWorkMarkets.com
GoFreelance.com
oDesk.com
FreelanceWebMarket.com
NetAFreelancer.com
ProgrammerMeetDesigner.com
GetAFreelancer.com
iFreelance.com
ProgrammingOutpost.com
Project4Hire.com
OutsourceHeaven.com
ContractedWork.com
ScriptLance.com
RentACoder.com

Classified Ads
You can place your request in the online classified ads such as CraigsList.org or BayAreaClassifieds.com. You might also want to find other online classifieds local to your area. Job Websites
There are some job sites that has a section devoted to freelance jobs. AuthenticJobs.com is such an example. Web Directories
There are many directories on the web that lists design firms and freelance talents...
Google Directory
Yahoo Directory
Open Directory
DesignFirms.org
WebDesigners-Directory.com
FreelanceDesigners.com
Forums
There are many web design forums that have a section where you can post a request looking for freelance help. Some of them are ...
Sitepoint.com
Webmaster-Talk
WebDigity.com
Ozzu.com
TalkFreelance.com