Tips for reducing bandwidth

The Fishbowl has a nice explanation on conditional HTTP GET, the Last-Modified header and ETags.

This article can help you reduce bandwith consumption if you are creating an RSS (or anything else) client or server.

Also add support for HTTP compression and you'll save a lot of bandwith. Free HTTP compression libraries are available here and here.

Update: SetETag(), SetETagFromFileDependencies(), SetLastModified(), and SetLastModifiedFromFileDependencies() may be of help...