Yes, it has now been released in the US, Japan, and UK.
Also, it stinks on toast.
The average web page, one that isn't graphics intense, takes up to THREE MINUTES to load.
It lacks any flash or video support.
In short, I would actually prefer to NOT HAVE internet access than to try to surf on the DS Browser.
Sad, but there it is.
Edit: Pertinent Links
DS Lite Browser
DS Phat Browser
Real World Test on YouTube