Have you considered website content writing?

with so much dross on the Internet nowadays, original, well written content is getting quite rare

It's already very hard to get top website or blog rankings without churning out unique and well written content on a daily basis - in the near future it will probably be essential

you will of course have to find some clients with deep pockets and a long-term commitment to getting and retaining good search engine positions

alternatively you could offer your services to smaller clients and create and maintain social network pages like HubPages or Squidoo pages

I suppose you could also create PDF ebooks for clients in order to promote their goods and services

I think sites like about.com will always need people like you