I work for a financial institution and am interested in providing an OFX solution
Microsoft have a set of documents for financial insitutions to sign up to provide OFX solutions for Microsoft Money. In the US there are quite a lot of banks and other financial institutions online, providing services through Yodlee or direct to customers. In the UK, it's a different story, with only one financial institution providing direct services (Nationwide Building Society), and around 20 providing one way services (see Article 235
for more information on one way and two way services).
By providing direct services, you can get your bank logo into the Money product, your customers can automatically download their banking information from your site amongst other services. It does not cost the bank anything to become a partner.