it's so much nicer to work at a properly ergonomic workspace that I rarely do this -- only for hackathons and the like.

This is my basic feeling right now, and I wrote about it in more detail here: http://jseliger.com/2008/12/26/computer-post-desktop-or-lapt... . Notice in particular the apt Lord of the Rings quote at the end.

I think laptops are (somewhat) overrated, though they might not be for you, in the plural sense.