Our requirements are to show a MrSID file and Shapefiles. Will the API for WPF/Silverlight do those? If not, is there another product to use that is fairly cheap that doesn't require licensing for every distribution?
ArcGIS API for Silverlight/WPF can only load map service published by ArcGIS for Server, they can't parse the mrsid file directly(but they can read shapefile directly). If your .sid file has correct spatial reference, you could try this https://geopbs.codeplex.com/ . Portable Basemap Server can publish your mrsid file directly as an ArcGISTiledMapService, so you could using arcgis api for silverlight or flex to add the service. Also you can read your shape file from client or server as a featureset. Btw, PBS is under LGPL license, you can use it freely for commercial purpose:)
