There is one feature from xdvi that I miss on all other paper like viewing platforms (for pdf, djvu, postscript, etc). When hitting the character 'm' then the application stores the paper coordinate under the upper left corner and when afterwards flipping pages, it will put the same coordinate in the upper left corner. This takes care of white margins (unless they are different on odd and even pages).

Btw, no reason to buy acrobat pro to strip margins and generate a margin free file. You can do it with ghostscript as well. Possibly even on the n900 itself.