I’m no designer, I can’t understand it, I love code and code has been my life.
For a non designer, typography is a huge 7 head serpent, and I would like to know, if there is something I can do to make my typography on the web better.
This is what I can do:

witch is nothing more than Blueprint CSS and
h1 {
font-size: 2em;
}
But I’m hating the Aliasing on the Arial font, below it’s a portion of the image above at 300% zooming

From a developer side, what can I do to make my web pages look better?
I have tried font-smooth: always; but without any luck.
Font rendering varies from browser to browser and OS to OS. You can adjust the letter spacing and sizes and things like that, but there’s nothing you can do, in CSS or JS code, to change how the edges are rendered or how jaggy they are.