Here are a few sites and blogs which we find useful …
Conflictoflaws.net – an academic focused blog on the conflicts of law
The British Institute of International and Comparative Law‘s website (BIICL)
The Journal of Private International Law‘s website
The Hague Conference on Private International Law‘s website (HCCH)
The British and Irish Legal Information Institute (BAILII) site giving free access to, mainly, UK and Irish case law.
The World Legal Information Institute (WorldLII) site giving free access to law from across the world.