Spaceweather Phone is a fee-based service that helps keep you in the loop regarding all things astronomical. Available in two flavors, you can choose the focus more interesting to you.
Space Weather Alerts provide updates on Aurora- and solar activity. If you're interested in solar flares, sunspots, and all, you can sign up for these alerts for $4.95 per month.
If you're interested in more general celestial happenings, then you might want to try the $6.95 per month Backyard Astronomy Alerts. You'll get calls about satellite fly-bys, meteor showers, comets, and more.
Whether you're a photographer who wants to grab pictures of the next Aurora, a ham radio operator worried about getting knocked off the air by magnetic storms, or just somebody fascinated by the nighttime sky, you might just want to give one of these services a try. They also suggest that, of course, either of these services would make a swell gift.