Not really yet, at least for experimental. Waaaaaay too early in development.
Existing mods (including Oxide, Magma, etc. which are mod platforms for plugins) will need to be updated for the new version, but according to Dorkslayz, it shouldn’t be too hard to update them.
Seeing as nobody can publicly run experimental servers yet (Multiplay has been given the server to test, but they’re not allowed to offer it to customers yet), there’s been no opportunity for modders to bash on the server and get their mods to work.
It’s only the rules sticky in the Rust Modding forum.