The Canon Powershot S1 IS supports a wireless remote:
http://www.cameras2u.com/products/de...UCT=9179A007AA
(remote is down list on RHS)
http://www.canon.co.uk/for_home/prod...1_is/index.asp
http://www.steves-digicams.com/2004_reviews/s1is.html
http://www.dpreview.com/reviews/canons1is/
http://images.google.co.uk/images?q=wl-dc100&hl=en
It is being replaced by the S2 very shortly (which apparently DOESN'T support the remote) so look out for some bargains.
Looking at the Canon site, the WL-DC100 remote control appears to support the EOS300D and the PowerShots S70, S60, G6, S1-IS and Pro-1.