I would use ASP.NET 2.0 WebServices plus WSE 3.0 which supports MTOM
specification (part of WS-* standard specifications), specially designed for
large attachments.

Signature
CESAR DE LA TORRE
Software Architect
[Microsoft MVP - XML Web Services]
[MCSE] [MCT]
Renacimiento
[Microsoft GOLD Certified Partner]
> We have an imaging system that consists of a key and up to a 10MB PDF legal
> description that will be accessesed via a web service. Does anyone know how
> to specify the datatype for the PDF file in ASP 2.0 (which we will be
> using).