Here is my new choice for interactive survey:
http://www.quask.com/en/home.asp
Some additional online Surveys:
Advanced Survey.com
www.zoomerang.com
www.surveymonkey.com
www.assessmentgenerator.com

SuperSurvey
Greenfield Online

Infopoll
Perseus
PollCat

Inquisite
Cool Surveys
Survey System

Apian Software
Hosted Survey
SurveyView

StatPac
SurveyGold
Survey Select

InstantSurvey
EZSurvey
Mercator

SurveyCrafter
PollPro
SurveyHeaven

Surveywire
ObjectPlanet
SurveySaid

mantaINSIGHT
Active Websurvey
SumQuest

CustomerSat
StatSurvey
SurveySite

QuickSense
SurveyTrends
LiveSurveys

InSite