Best online travel resource for small, virtual business?

I have a 10 person company and am looking for a travel site where my employees can book their own business travel (hotel, car, plane tickets), get rates that are as good as any consumer site, but use the corporate account and have simple control tools for the company. What's the best resource?
I am based in the US

which area you are in? Asia or Europe?

I have the perfect solution for you. Please check out this website : www.savvypassenger.com and see the rates.
If you like what you see and would like to have a website just like this for your company and have your virtual secretary track all travel for you, please get in touch with me or go to www.savvypassenger.biz and find out more.