Pesquisando mais um pouco vi uma resposta para uma pessoa que queria usar moedas customizadas no gnucash. Basicamente consideraria Bitcoins um ativo, cria uma conta utilizando esse ativo e nas transferências de/para esta conta se informa a taxa de câmbio. De quebra dá para pegar a cotação do Yahoo (
http://finance.yahoo.com/q?s=BTCUSD=X) e talvez utilizar a cotação do USD/BRL (
http://finance.yahoo.com/q?s=USDBRL=X) para ter o preço em dólar (comercial) se puder utilizar formas no gnucash (nunca usei esse tipo de feature então não posso comentar.
Currencies aren't user editable, but then if you were tracking your investments in bubble gum this probably isn't what you want to do anyway.
What you can do is add what gnucash calls a Security using the tools->security editor dialog. You can choose one of the pre-defined types (AMEX/NASDAQ/FUND/etc) or just type your own.
Once you've created your own security, just add a new account and select the new type you've added from the drop-down and your new security should appear. When you transfer cash into or out of these accounts you'll need to set the rate which applies when converting between the two (as with foreign currency transfers).
This is primarly designed for managing investments in stocks and mutual funds, but it will work just as well for bubble gum, calories or whatever other crazy stuff you need double entry level consistency for. There is also an online quote feature, but last time I checked Yahoo didn't have price data for units of air temperature
.
Boa Sorte, e se conseguir bolar uma solução com o gnucash posta aqui porque pode ser útil para outros membros.
Abraço,
Adriano