I used to subscribe to Multihulls World, don't anymore simply because I get too many magazines as it is. But - I liked it simply because I saw boats reviewed that I didn't even know existed here in the US, and I'm interested in looking at big boat reviews as well. If you're just looking for beach cat info it's probably not worth it. If you like looking at the whole spectrum, it probably is. They seem to be pretty thorough on most reviews (although some not), and review used boats as well. Sometimes the translation is amusing as well. The magazine itself is interesting in that it also has blurbs on sightings and status of classic/historical multis.
They recently had an article providing insight on what it takes to ditch it all for a year and sail the world on a cruising multi. Great for day dreaming if nothing else...