I see Lectrosonics has announced their latest "toy" lol the Octopack...an antenna coupling device for their dual-channel SR receivers. It can hold up to four receivers for eight channels of audio. AND it's suppose to be small enough to fit in a mixer bag, powered by L or M type battery packs.
I kind of wonder if this along with their SR recievers spells the end for the 400 series which, personally, I love. There's just something about them [400 series] that says rugged.