automate the synching of T-Hub/Quickbooks with Ebay Blackthorne

I am looking to synch all my information in real time. Here is what i have now. I am using [login to view URL] for my shopping cart (MSSQL)which in turn works with a middleware application called T-Hub (Access DB) [login to view URL] which then pulls all orders and sales info from the shopping cart and imports it into Quickbooks. I also sell on ebay using Ebay Blackthorne as my listing application and ebay interface this is using (MSSQL. Ultimatley i am looking to acheive a real time Inventory and new product procedure that will keep all inventory up to date across all platforms and also replicate new items across all platforms for a quick Time to market strategy. I would expect plenty of communication between myself and the developer as this will be a very intricate project. I have a very good idea of what i need accomplished but am always open to suggestions on how we may be able to do this easier.