In the U.S. there are three general electronics magazines:
Circuit Cellar
Nuts & Volts
Elektor
Of these, Circuit Cellar is the more advanced and covers topics that are probably over the head of most beginners, but it's still worth a read in any case.
Elektor will be familiar to European readers as it's been published in multiple language versions over there for decades. The U.S. edition dates from the beginning of 2009 and contains the same editorial content as the UK edition. The construction articles in Elektor are quite well done and are look very professional. Elektor recently bought Circuit Cellar, but haven't changed the focus of that magazine (yet). Whether they do in the future remains to be seen.
Nuts & Volts is geared more toward hobbyists and beginners, but it's still good for all levels (at least some of it). It has several long-running columns devoted to the Arduino, the PICAXE, and (starting recently) the Parallax Propeller.
Another good option is Everyday Practical Electronics, which is published in the UK and sold by major U.S. chain bookstores.
Although not strictly devoted to electronics, Servo Magazine (published by the same people who publish Nuts & Volts) does cover the electronics aspects of robotics. There is some overlap with Nuts & Volts, but not a lot.