The National Science Foundation SBIR solicitation is due on June 14.
NSF is now allowing SBIR applicants to submit a short "project pitch" to get feedback from NSF program managers. This is a pilot program to save applicants the trouble of applying for an SBIR grant they are certain not to receive. Applicants who clear the bar will be invited to submit a full application, but first they must be invited by NSF after submitting the project pitch.
Interested applicants are encouraged to participate in a webinar on March 14. Link here to register.