After METS 2007, I wrote about how many new AIS products Comar had in the pipeline.  Well, this U.K. company hasn't slowed down, and has even developed a snappy new logo and Web site.  Comar's latest is this AIS-Multi, which seems like quite an able AIS listener at $399 (from U.S. distributor Milltech Marine).  It features true parallel receivers, so slow Class B updates will plot as well as they can; an amplified VHF splitter, so you don't need to add another antenna; USB data output, so you can connect it to a modern PC without needing a serial converter; and, finally, the ability to multiplex in NMEA 0183 data at 4800 baud (GPS most likely), so the unit's 38,400 baud data output can be easily used with a plotter whose NMEA 0183 port was already in use (and the PC will get it, too).  But...