This is supposedly the list for the Canon 2009 spring rebates, leaked early:

Canon Instant Rebates: May 3 – July 11, 09

Canon lenses:

EF 200mm f/2L IS USM – $500
EF 85mm f/1.2L II USM – $130
EF 70–200mm f/2.8L IS USM – $200
EF 100–400mm f/4.5–5.6L IS USM – $100
EF 16–35mm f/2.8L II USM – $100
EF 50mm f/1.2L USM – $100
EF 24–70mm f/2.8L USM – $80
EF 70–200mm f/4L IS USM – $75
EF-S 17–55mm f/2.8 IS USM – $70
EF-S 10–22mm f/3.5–4.5 USM – $50
EF 17–40mm f/4L USM – $50
EF 70–200mm f/4L USM – $40
EF-S 17–85mm f/4–5.6 IS USM – $50
EF 100mm f/2.8 MACRO USM – $35
EF-S 60mm f/2.8 MACRO USM – $30
EF 28–200mm f/3.5–5.6 USM – $30
EF 28–105mm f/3.5–4.5 II USM – $20
EF-S 18–55mm f/3.5–5.6 IS – $15
Flash Units
SPEEDLITE 580EX II – $50
SPEEDLITE 430EX II – $30
SPEEDLITE 220EX – $30
MACRO TWIN LITE MT-24EX – $70
MACRO RING LITE MR-14EX – $50


bodies

Canon cameras:
EOS 50D Kit + EF-S 18–200mm f/3.5–5.6 IS – $300
EOS 50D EF-S 18–200mm IS Kit – $300
EOS 50D EF 28–135mm IS Kit + EF-S 18–200mm f/3.5–5.6 IS – $300
EOS 50D Kit + EF 70–300mm f/4–5.6 IS USM – $150
EOS 50D EF 28–135mm IS Kit + EF 70–300mm f/4–5.6 IS USM – $150
EOS Rebel XSi EF-S 18–55mm IS Kit (B) + EF-S 55–250mm f/4–5.6 IS – $200
EOS Rebel XSi EF-S 18–55mm IS Kit (S) + EF-S 55–250mm f/4–5.6 IS – $200
EOS Rebel XS EF-S 18–55mm IS Kit (B) + EF 75–300mm f/4.5–5.6 III – $100
EOS Rebel XS EF-S 18–55mm IS Kit (S) + EF 75–300mm f/4.5–5.6 III – $100