The registrations site is live at: http://www.regonline.com/sensys2009. The early registration window will be open until October 15th at the following prices (all figures are in US dollars):

EventACM/SIG MemberNon-MemberStudent
Sensys'09$700$775$375
BuildSys'09*$210$290$140
WUNET'09*$210$290$140
WISP Summit*$0$0$0

After October 15th, late and on-site registration for Sensys'09 will be:

EventACM/SIG MemberNon-MemberStudent
Sensys'09$770$860$450
BuildSys'09*$265$345$170
WUNET'09*$265$345$170

*Please use the above link for workshop-only registrations. You will be able to choose which particular workshop on a later page in the registration process.