Fluid Surveys is a site I just found out about on Twitter. This is one of the most robust online poll/survey creators around w/ a very nice drag/drop interface. Also, FS has a great number of user options, such as the ability to export results (pdf, powerpoint, excel, etc) embed into a site, and create templates. This is a paid site like most survey creators are but the free version should be more then enough for most educators.
I highly recommend giving Fluid Survey a try by clicking here!!!