InDesign Magazine is a very nice magazine that comes in six issues every year in PDF format to my inbox. A while ago they offered a big discount drive where you would get one year’s subscription for $25 instead of $59 including their “Type Super Guide”. Now they are doing it again but only until June 30th so if you want to subscribe, act fast!
Personally, I really enjoy this e-magazine as a source of InDesign goodness coming to me every two months. Perhaps you would like it too? You can get a free issue to see how it is before you buy.