Lexicon is known for their digital reverb. At Winter NAMM 2007 they updated the MX line of rackmount processors. Of note, the new MX500 allows you to run it as a plug-in for computer based DAWs via firewire. That's pretty neat. Check out the video for more info.
Marc Nutter, VP at Sonic Sense shares a couple techniques for controlling stage monitor feedback using PreSonus Studiolive and Rational Acoustics Smaart. Check out our blog: [site]