A more comfortable bicycle

Ok, so I have a bad back. Bending over on my bicycle gets uncomfortable. One has to ask, why should such a fun activity cause me discomfort?

I wish I could push a button and my handlebars would extend up somehow so I could sit almost upright. Then when I want to go fast, push another button and they go back to racing position.

And here's a crazy idea - someone invent a comfortable seat. I'm trying the 'latest thing' out on my old bike now, we'll see if it's any good or not when I get it back from the bike shop.