Problems with simple WCF service in SharePoint

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Hi,

I have written a very simple WCF service that I'm trying to host in SharePoint. I followed Sahil Malik's instructions (http://blah.winsmarts.com/2008-5-SharePoint_as_a_WCF_Host.aspx).

Intro: the service is supposed to return some data from a provided List/Document Library. I've created a custom class to hold the info I need and the service will return a collection of these objects.

First I ran into issues with the binding. I used basicHttpBinding, but that didn't work. This is an intranet site so anonymous access is out of the question. I ended up getting the service up in a browser by using <security mode="TransportCredentialOnly">
<transport clientCredentialType="Ntlm"/>
</security>.

I created a simple console application that calls the service and when I run this on the server I get errors:

Could not load file or assembly 'Microsoft.SharePoint.intl, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. Access is denied

.. but sometimes this error is replaced by an access denied error from the SharePoint API (excerpt: Microsoft.SharePoint.SPGlobal.HandleUnauthorizedAccessException(UnauthorizedAccessException ex)).

The service will be used by an Silverlight application running on the same server as the serivce... but I need to get it to work from my console app first.

Edit: What would be the best would be if I could run the service with no security set, maybe other than my own custom security (a simple username/password passed to the method(s)). Is this possible? If yes, how?

Any ideas?

Thanks!