For instance this is possible with Thinkswim my "normal" brokers: your trades can be passed to your profile on a third-party site where it's publicly viewable with league tables etc.
Simply that it's not needed and they have other infrastructure problems at the moment!
I mean specifically the collating and hosting of the league tables etc. - until Mt Gox has the robustness of other exchanges this is just fluff IMO.
Mt Gox need a desktop client not a webpage, the client could get confirmation the trade was made and pass the data on.
Although it could be done on a daily basis for those who opt-in I suppose but I don't see Mt Gox spending time or money on this in the foreseeable future.
I am all for it in principle though as would Mt Gox be I imagine WHEN and IF they can spend time on bells and whistles