Can you design & implement new features to Interchange?

I need someone who can not only design & implement new features to
Interchange, but can also provide ongoing support for the store in a timely
and professional fashion.

I have written a specification of the new features we need. It's ~2mo old,
so I need to revise it, but it boils down to (in order of priority):

Fixing bugs, some minor, some major, some no doubt caused by our
implementation. Some are alternate browser issues, several CC issues and a
variety of others.
Fed Ex integration for customer shipping/tracking.
Fed Ex & Invoicing on the backend.
Order flow process - single click processing
Multi-Level Pricing (dealers, etc)
Bugs
Look & feel cleanup (frontend & backend)
Partial shipments/backorders
Reporting
Inventory handling
Performance cleanup (due to my editing there's probably a lot of trash)
Admin can 'unlock' an order allowing a user who's changed his mind to edit &
resubmit without needing to cancel the order.
USPS integration & tracking.

When I originally spec'd this out and started seeking someone to do the job
I wanted to own the results. 
I've changed my mind on this topic and would like to contribute the results
to the Foundation Project.

I really want/need a totally kick-ass web presence. 
I think I have the bits and pieces. Now to stitch them all together and make
it flow.

If you are interested in browsing what we have today, here it is:
www.UnlimitedEngineering.com

I'm certainly interested in getting someone professional on this project.

We are in the Charlotte, NC, USA area. I prefer to work with someone local,
though am willing to consider individuals at a distance.

Contact me: [email protected]

Thanks for your time,
Robin