GIMP: Change Background from Black / White to Transparent

This is one that I find myself Googling for regularly but spend time wading through poor results and solutions:

http://brainsongimp.blogspot.com/2008/03/black-and-white-jpg-to-transparent-png.html

Thoughts, ramblings and rants of a husband, father, network engineer, sysadmin, coder, company owner, employer, chartered accountant, sci fi fan, political anorak, impatient grump...

I live in Dublin, Ireland with my wonderful wife and darling daughter.

B.Sc. (Hons) Computing and Mathematics 2001, University of Galway.
Chartered IT Professional (CITP) and member of the Irish Computer Society (MICS).
Chartered Accountant (ACA, CPA) and member of Chartered Accountants Ireland.
Diploma in Corporate Governance (DipCorpGov) and member of The Corporate Governance Institute.

Co-founder of Island Bridge Networks - a company specialising in internet infrastructure providing mission critical network engineering, system administration, VoIP and development services to the ISP market.

Provides an outsourced CTO, strategy, leadership and risk management consultancy to Board- and C-Suite levels via Open Solutions.

Outsourced IXP expert, management team and operations team with INEX, the internet peering point for the island of Ireland. Project manager and lead developer of IXP Manager, a free and open source platform powering over 200 IXPs around the world. IXP advocacy and consultant in both commerical and pro bono capacities.

Creator of a SaaS service bringing telecom and utility billing into the 21st century. Live with a number of telcos - see Island Bridge Billing Systems.

Expert PHP programmer, trainer, interviewer and consultant. Creator of many PHP applications - see the projects page.

Likes to talk - see my previous talks and presentations.

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