Ask About Money
Financial advice website. Might not be the best place to get advice on property. AskAboutMoney banned discussion of house prices as they were peaking, and banned users who attempted to warn of the risks of buying into the bubble.

Irish Landlord
A forum and information site aimed at Irish property investors and landlords.

Money Talk
An alternative financial advice website. Not nearly as busy as Ask About Money. The founder of MoneyTalk.ie created a similar site in New Zealand that has really taken off.

The Property Pin
One of the first websites or media outlets of any kind to really seriously question the Irish Property Bubble. The Pin's membership swelled dramatically when those skeptical of "The Fundamentals" were banned from Ask About Money.