Yes, I have seen quite a bit. Try these…
http://www.internettg.org/jobs/jobs_toc.html
http://hotjobs.yahoo.com/jobseeker/jobsearch/search_results.html;_ylt=AkDV7UGMTNyflNKqspxNTVr6Q6IX?keywords_all=ui+designer&kw=ui+designer&type=main&metro_area=1&country1=USA&page_number=1&order_by=date&search_type_form=quick&updated_since=sixtydays&related_t
http://jobsearch.monster.com/jobsearch.asp?q=ui+designer&re=0&sort=dt&tm=&vw=b&cy=US&brd=1%2C1862%2C1863
http://jobs.ok-cancel.com/