This report from the NPD group is a few days old, but somehow I missed it. OS X Daily breaks the numbers down:
\* 85% of Mac owners also own a PC
• 72% of Mac owners use a notebook / laptop
• 66% of Mac owners own three or more computers
• 63% of Mac owners own an iPod
• 49% of Mac owners own a navigation device (GPS, but is iPhone included?)
• 36% of Mac owning households report incomes over $100,000
• 32% of Mac owners have a Digital SLR camera
• 28% of Mac owners have an iPod Touch
• 20% of Mac owners have a Flash-Memory Camcorder
• 18% of Mac owners have a 50″ or greater LCD TV
• Average Mac owners have 48 consumer electronic devices, vs 24 for the average Windows PC user
• Mac ownership/marketshare is up to 12% in the USA, from 8% last year