I sorted through about 100 applications recently when I was lookin' to hire a modeller (not a big deal company or anything, just an indie that got some funding), and yeah, relatively few of them showed their work ingame, which made me faaaar less likely to give them the work.
This is maybe kind of a weird suggestion (I'd hope an obvious one) but for the love of god don't use one of these awful slideshow preview things for your images. I want to just middle click a thumbnail. Probably I'm a huge asshole but I skipped most of a guy's portfolio on account of this shit.
That guy's portfolio is pretty good though.