Asynchronous calls through a WCF service

[SPEnthusiast]

I'm currently building a MOSS 2007 portal. I'm also using Windows Communication Foundation services in this project. I'm exposing my business logic layer as a bunch of WCF services.

I would like to use asynchronous calls to make my portal more scalable. There's a Page.RegisterAsyncTask method available to be called from WebPart code. Once I call into WCF this way - I mean, asynchronously - would I face any problems if I called into a SQL Server stored procedure from my WCF code, if the stored procedure used "WAITFOR" ?

Thanks.