Router is prolly the best way to go about doing it.
In case someone out there doesn't have a router and has this problem, another thing you can do is to lay out your cut line, put masking tape over the cut line (centered on the line, of course) and score it several times with a utility knife. Then use a saw, cut right through.
The scoring will help with chipping/cracking the laminate (although it still may happen)
The router, though, is the best way to do this.