Sorry for your long wait. This Project may restart in Summer 2013 with php Kohana Framework, but I have to wait some circumstances if that will be.
... Seems that the work on Open Rentstock can continue... :)))
Universal web based, easy to use, Multiuser, Multilanguage Project based Stock and Rent management Software with article-stock-timeline, Truck-load-manager, extern Client booking Module and Excel-export. Runs on PHP and MySQL
Great app openrentstock
Works, very small, no complaints.