I had a subscription for Analog and Asimov on my Nook, but the terrible quality of the ebook edition (missing paragraphs, no logical separation between chapters, etc) made me drop the subscription months ago. Right now, I just have a couple of IEEE magazines coming in, good for reading when I'm stuck at the airport. I find it hard to get time to read magazine articles lately, because they fall between reading short summaries on Slashdot (preference at work) and reading a good book (preference at home).