I like Evince but it doesn't open PDF files directly from the browser (you have to save them locally first, which is not always the most convenient option). Also, Evince is a little less stable and crashes when viewing large PDF files during zooming in or out or scrolling. Evince also takes longer to load/display/render many PDF files especially with images and I frequently see "Loading..." in Evince. But I still end up using it because the default PDF viewer on N800 lacks continuous page scrolling and PDF links while evince is great with those. Evince also has option to rotate right (akin to portrait mode) and when you view a PDF in rorated/landscape mode, Evince allows single finger touch scrolling through pages (right to left) like iPhone picture application.

If Evince becomes more stable and faster in OS2008, I would be very happy. I don't know if it will allow opening the PDF's in browser though...