Ant has done some similar things, and might be iterested in the urban transport aspect. If it is just a fork, anyone can do it and mail it.

I probably wouldn't do it for my own bike. I have a similar project under way to carry some of the front fork functions. I prefer to just have super beefy attachments, because front rack function can vary as to trip etc... or panier and load configuration. I was looking at a BMX fork where there were separate braze ons for pegs (rather than their being integral with the axle). That in addition to other braze ons mid fork and crown is super beefy in my book, and there are more elegant ways.