Site for Chartered Institute of Public Relations in the UK. Click PR Job Shop for job board and click Careers and Education for information on what working in public relations involves, work experience opportunities, and PR courses around the UK.
Useful "quick and dirty form that scans all Craigslist cities for telecommuter (work at home) jobs." Enter "writer," "editor" or related to see newsy work you can do from home. Most in US, but it searches through all the Craigslist communities.