I'm looking forward to the DARPA Challenge to create a service where you can sign up to be emailed about new challenges. This one started October, 2025. More details at https://www.darpa.mil/research/challenges/lift/competitors

"Phase 1 | Launch

October 2025

Special Notice publishing (Oct. 23): DARPA publishes a Special Notice to broadly announce the Lift Challenge and solicit innovative design concepts.

Website launches (Oct. 23): DARPA publishes a Special Notice to broadly announce the Lift Challenge and solicit innovative design concepts.

Rules and prize announcement (Oct. 23): Detailed draft rules and prize structure are announced, specifying objective and subjective judging criteria."