Just linking a local copy of the Save for Web plugin. The gimp plugin registry was toasted.
gimp-save-for-web-0.29.3.tar.bz2
Originally found on the wayback machine but in case it ever goes away…
https://web.archive.org/web/20160402173621/http://registry.gimp.org/files/
The source can still be found here: https://github.com/auris/gimp-save-for-web