The Rome Fetcher now supports RFC3229 Delta-Encoded feeds (in CVS). The Rome Fetcher already supports GZipped feeds and conditional get. Hopefully, this additional feature should ease the burden on syndication client authors.

There are test cases in CVS, but I have failed to find any real world servers to test the delta-encoding support against, so any stories of succesful use (because obviously there could not possibly be any bugs…) would be appreciated.