Next-Generation 911 (NG911) infrastructure will replace analog systems designed to support voice services for landline 911 callers with digital, IP-based systems that will allow smartphone users to 'call' 911 via voice, text, image, and streaming video. This brief paper reports findings from a workshop conducted at the 2019 911 Early Adopters' Summit, during which local 911 professionals from across the United States reflected on strengths, weaknesses, opportunities, and threats associated with the adoption of NG911 infrastructure and, in particular, multimedia 911 services. Workshop participants pointed to long-standing issues NG911 stands to exacerbate, including high non-emergency call volumes, poor staff retention, and inadequate psychological support which the influx of multimedia 911 calls, including those with graphic imagery, may worsen. At the same time, participants looked to local, existing resources to mitigate these issues and exploit new opportunities afforded through NG911 infrastructure. Using these findings, preliminary recommendations are offered to improve information resources available to local 911 professionals adopting NG911 systems for effective and efficient multimedia 911 services.