I work on a Cruise Ship and up until yesterday used to carry my 17" MBP, an iPad (1st Gen), an iPhone4, a couple of iPods, a 2tb external drive, a 1tb ext drive and a Nikon D90 in my Carry On bag, so it's always been quite heavy.
Yesterday I was in New York City for the day and after going to see 'The Book of Mormon' on Broadway I decided to go and visit the Apple Store on Fitfh Avenue, I left there with an iPad 2 (64gb) and a Mac Mini ($799 model + wireless keyboard, mouse and dvd drive), I decided to replace my MBP with the Mini as it's smaller, lighter and I have a HDTV in my cabin to link it too... The only problem I've encountered is the fact that my TV is mounted on the wall above my desk, so I have to look up all the time, but other than that, I'm loving it!
I'll sell my MBP to another crew member (it's a 2009 unibody one, so I'm thinking about selling it for around $800) and I'll give my old iPad to my father when I get back to England in March.