Hi Matt,
I agree that researchers are a potentially large market for the iliad. I got mine mainly because reading PDFs on an LCD was killing my eyes, and largely thought of it as an alternative screen. I am now using it much more than I ever thought I would for work, and am also now reading much more for pleasure (books formatted by feedbooks look wonderful!).
Just a quick reply about the versions of ipdf. In the long week or so we have before the first combined version will be released you could try this
set of installers. It includes 3 versions: the standard iRex; fullscreen; and column mode versions.
EDIT: I have just added the bookmark version (that I think also includes the fullscreen patch).
EDIT: Unzip this on your iliad or usb stick or CF disk, go to it on your iliad and then you can choose between versions. You won't get any message telling you which one is currently installed I'm afraid. There's probably no point me making that happen with the new combined version so near.