I wasn't completely satisfied with soPDF (although I may try it again to see what some of the options do, couldn't get it to work at all this morning for some reason) to crop white margins. I want them to maintain there normal orientation so that *I* put it into landscape mode on my Touch, so when I make notes the controls are oriented normally. So I decided to ask at work if there were any computers around with Acrobat on them that I could use. Yep. Opened several PDF's (academic multi-column journal articles) and cropped them. One wouldn't let me crop (from a Japanese journal--presumably protected?). The others fine, lovely job of trimming the white margin as displayed on my computer monitor. Did "save as" and put them in a different folder with a different name. Moved them onto my reader. The margins are still displayed, same as they were when I had tried the articles as-is (note, I did remove the orignial copies from the device before moving the new "cropped" ones on).
I am sad--I think if all I do is trim that little white bit, the files will be perfectly readable in landscape with original formatting. You'd think if a free program (soPDF) was pretty close to workable for this task, the Real Thing (Acrobat) would be up for it.....