I'm kinda late to this one, but this is something that's really been miffing my wife and me a lot over the past few years... vacuums, coffee makers, dishwashers, CD players... all of it.
A couple others touched on the consumer aspect of things. The instant gratification. The "Wal-Mart Mentality™". Our excess of disposable income has gotten to where things that used to be carefully thought-out purchases (like household appliances) are now more like impulse buys.
We cry a lot on this site about "Made in China", but it's our fault that all that manufacturing has gone to China. We demand a lower price. We shop based on price, not value. (Whoa! You mean there's a difference?!?). All these things are no longer designed for "value". What rules is "Ease of Manufacture". And the easier they can manufacture the widget, the cheaper they can sell it. And if they can sell it cheaper than the other guy, they have a sale. If it breaks next week, then they have another sale.
Now, think about where all this stuff ends up. Eventually the landfill. If you want to truly get "green" or eco-friendly (not typically a big issue for us car guys, but...), then think about that $15 coffee maker that you HOPE will last 6 months.
In a way, I almost wonder if the ridiculous fuel prices have caused us to take some of this into consideration now. I know my family is surely a lot more careful about how we spend our money now. Fortunately, God has blessed us with the financial ability to give consideration to a widget that might cost 2-3 times as much, but expected to last 6-8 times as long.
Back to vacuums, after the last several of ours that barely made it 18 months, we just bought an Oreck with a 21 Year Warranty. We'll see how that holds up.