Popplewell's activities in the area of new media have taken her in recent times to events such as WeMedia Miami, BlogHer '07 (Chicago), the IdeaFestival (Louisville, Kentucky), 5th International Online Journalism Seminar (Barcelona, Spain), 9th International Symposium on Online Journalism (Austin, Texas), Ars Electronica (Linz, Austria) and Highway Africa (Grahamstown, South Africa). She has run the digital audio component of the Educational Technology course at the University of the West Indies' (St Augustine) School of Education as well as new media workshops in Alexandria, Egypt (for Canal France International) and at the Global Voices Citizen Media Summits in Delhi, India and Budapest, Hungary.
Popplewell started her media career in 1989 at the pioneering television production company Banyan, where she developed and produced Body Beat, a magazine series on AIDS targeted at adolescents. She is also a founding member of Earth Television and has worked in the US as an Associate Producer on the Nickelodeon pre-school series Gullah Gullah Island. She has been a producer/writer for All Sport Promotions' magazine series Caribbean Sports Digest and also helmed the production team for All Sports' feature documentary 25 Years of West Indies Cricket. She has also been music editor at Caribbean Beat magazine and editor of The Ticket, a flm and entertainment magazine. Popplewell has also contributed to international publications such as The Rough Guide to World Music and National Geographic Latin America.
Popplewell has also been an active participant in flm industry planning and policy development in Trinidad and Tobago. In 1995 she curated the Carifesta Film Festival, and was on the screening committee for 2002's Kairi International Film Festival (now the Trinidad and Tobago Film Festival), for which she continues to be an informal advisor. She has also participated in various capacities in the Images Caraibes flm festival in Martinique, Le Festival de Trois Continents (Nantes, France), Le Festival d'Amiens (Amiens, France), the Sithengi Film and Television Market (Cape Town, South Africa) the St. Barth Film Festival (St Barthélémy, French West Indies) and the Caribbean Tales Film Festival (Toronto).