PS Thanks meruru for mentioning http://plaintextaccounting.org. I started it to knit and grow our community, give more visibility to the non-Ledger projects like hledger, beancount and the rest, help answer VFAQs on IRC and mail lists, collect best practices, etc.

That site is also worth checking out for more hledger materials, such as comparisons, talks, slideshows, and blog posts. Eg Andreas Pauley's quick intro slides (https://pauley.org.za/functional-finance-hledger) or my slow "Hands-on with hedger" talk and FLOSS Weekly appearance.