Here is the short version
HyperShot web
800 by 450 realtime resolution
• 360 K Pixel rendering resolution
• Windows XP/Vista, 32/64 bit
• Mac OS X, Intel-Based Mac
• $ 195 listprice
HyperShot HD
1920 by 1080 realtime resoution
• 4.1 Megapixel rendering resolution
• Windows XP/Vista, 32/64 bit
• Mac OS X, Intel-Based Mac
• $ 995 listprice
HyperShot Pro
• Unlimited realtime resoution
• Unlimited rendering resolution
• Windows XP/Vista, 32/64 bit
• Mac OS X, Intel-Based Mac
• Call...and ask