Actually, cbrpager was recently put into extras-devel/testing by me. I ported it for the n900. It has to go through the "testing" before it is promoted.

Now, I would estimate that .cbz files would be faster than .cbr since cbrpager actually handles zip files internally. cbr has to run & extract the .rar file externally to view the images.

I do NOT have a n900, so its not going to easily be able to optimize this any.

Nathan