At this time filter.nostr.wine is read only. You would still need to write events to public relays separately.
We absolutely plan on adding this soon as an optional parameter for the relay. We would broadcast your events to some amount of top public relays.
That would be great! My only worry is that if I remove popular relays from my list right now then my events will never end up on the bigger relays. Kind of need both broadcasting and event syncing to totally eliminate the need for those relays on my client. These are great developments though! Well done!
This is exactly what we want as well so it will be coming!
