http://en.wikipedia.org/wiki/Shake_Weight
just hold onto them for 6min/day?!
sit at desk, surf web/respond to email one handed, and other hand...
you don't need a shake weight for that...
i don't think its a "gimmick" in the same sense as a traditional useless piece of exercise equipment...sure it's got the aspect of not really doing anything beneficial for you while getting you to waste your money on it, but this goes beyond the average useless piece of exercise equipment. at least this one makes you look like a hooker while you're using it; it has the whole element of "hey, people know this from SNL, and it totally looks like you're giving a hand job...further, all those people who say "I'd totally buy it for my chick, maybe then she'll be able to give a decent hand job" will be giving us money! let's sell it and see how many people will actually buy it. for every 100 sales, everyone takes a shot!" plus, it's actually hilarious for the consumer. if i somehow had one, i would point it out to people in reference to the skit and talk about how hilarious it is for a minute or so. if i had some truly gimmicky useless piece of exercise equipment i'd probably just get rid of it, or if nothing else put it in the back room to collect dust. basically, shake weight = hilarious. normal useless equipment != hilarious.
this reminds me of the episode of south park where mr. garrisson invented a gyroscopic vehicle that was so amazing that it was going to make the airline industries go out of business...the caveat is it had like 4 dildos on it to be used as handles/supports. a mouth "control", 2 hand controls, and one that goes into your ass to secure you to the vehicle. when stan's dad confronted mr. garrisson about these...contraptions...he pointed out a few key design issues with the device. to paraphrase, the conversation went something like this:
"i noticed that, for these hand and mouth controls, there are actually buttons on the side of the device that will give you the same functionality."
"yeah, and?"
"and is it really necessary to shove this thing in my ass? i mean, couldn't you just put a normal seat on it?"
"...well, sure...but where's the fun in that?"
in short, sure you could just use a normal dumbbell, but where's the fun in that? not that i give hand jobs but it'd be hilarious to see someone using one of these intently.