If there is already something available for accomplishing this, I see no motive for me to wait more and order a cop :-)
Probably the GenoPro folks are aware o Geni.com and it´s collaborative editing system. It´s something to look forward...Geni.com still full of glitches (no intra-family marriages by example) but it does show how to provide a relatively nice web viewing system for trees, which you guys should pa attention...