I don't think the magazine itself accepts unsolicited kit reveiws... They have their own gang that does that..
Build articles, on the other hand, they do accept... The forum member most experienced at it that I know of is Karl Logan, AKA "The Doog"... You might want to ask him how goes about it via a Private Message... Just find a post he's replied in, or a thread he's started, and hit the "Start Conversation" button at the bottom of one of his posts... Karl's had five or six articles published that I can think of..
The "official" way to submit articles is found here:
http://www.finescale.com/The%20Magazine/Contribute%20to%20FSM/2004/01/Submit%20to%20FineScale%20Modeler%20magazine.aspx