First Minister Carwyn Jones says the Welsh Government will start using the .wales and .cymru domain names from next year.
Businesses in Wales will be able to apply for the addresses from the autumn, with a wider roll out beginning in 2015.
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Plenty of fine dry weather to come today and prolonged spells of sunshine. A cool easterly breeze will take the edge off the temperatures.
The three-day event in the Welsh capital is expected to attract more than 20,000 visitors.
Steve Ashton's picture of a jacket potato and corned beef served to his 81-year-old mother has been shared 130,000 times on Facebook.