I see a lot of integration w Quickbooks Online, but i need Enterprise - Hosted <-> Salesforce. Anyone has experience with this? thanks!
I believe QuickBooks Hosted is just QuickBooks Desktop (and QuickBooks Enterprise) on a Citrix-esque server. So, you need to find a tool that will integrate with QuickBooks Desktop/Enterprise, then see if you can install the application on the Server your QB instance is running on.
So, I'd suggest you first check with the company providing the QB hosting and ask them if you can install a small application on that server.
If the answer is yes, you can look at the solutions provided by Avankia, Interweave, and a few others. Be warned that these solutions were developed a number of years ago and can be a bit heavy to setup.
If none of this works, and integration is an absolute must, you might have to move your QB to self-hosted.
Or, if cloud is more important, move to QuickBooks Online or Xero with an accountant.