The survey package has benefited from code, bug reports, and feature 
requests from users, including:
  Daniel Almirall
  Guiseppe Antonaci
  Norman Breslow
  Stefano Calza
  Ben French
  Jacques Ferrez
  Daniella Gollinelli
  Alistair Gray
  Lucia Hindorff
  Lisa McShane
  Ana Patricia Martins
  Daryl Morris
  Ana Quiterio
  Gillian Raab
  Brian Ripley
  Fred Rohde
  Steve Roberts
  Andrew Robinson
  Lee Sieswerda
  Phil Smith
  Takahiro Tsuchiya
  Richard Valliant
  Tobias Verbeke
  Renzo Vettori
  Diego Zardetto
  Alan Zaslavksy
and from initial dicussions with Chris Wild and Alastair Scott. 

Patrick Aboyoun did the S-PLUS port.

The svyolr() code is largely ripped from the MASS package of Venables & Ripley.

There are probably others who should be listed but whose names have been
lost due to poor record-keeping. 
