Hi David,
It is a fresh implementation. We also have built our own metadata framework in Python (something like Django but with tight client side integration).
I have not had a detailed look at OfBiz, infact I had a re-look at it right now. Here is what I find
1. The modules are plenty. We can pick up a lot of ideas from it, though apart from e-commerce we do have many of the features. We do have a lot of depth - just comparing the inventory settings in the Product master, we have a lot more features and validations. But they have more breadth.
Even comparing the chart of accounts, we have a tree structure with a widget to go with it. Ditto with Item, Customer, Territories, Suppliers etc, we have a tree structure.
2. The code base seems very large, we have a much small code base and our metadata approach keeps our code base much smaller.
3. I would like to believe that our interface is also a bit easier to use and much more web friendly with Social Networking features... We are also adding social gaming features by giving users points for doing things like booking orders, making payments etc so that it motivates them to use the system better.
We have around 20 companies who are paid users so we are constantly learning from them!
Hope this was useful
- Rushabh