Ben over at Breakthrough Assault is thinking about starting Malifaux so I pointed him in the direction of some useful sites and I thought I'd post them here as well for anyone else looking to start playing or improve their game.
Tactica: Pull My Finger is a great resource with tips and tactics for the various masters. A Must Read!
Ratty's Crew Creator: This is a great utility to help you pick a legal crew. It also shows you all the models you can use with your chosen master.
V2 cards plus accessories: Some people bought models when Malifaux was first released and the cards have since changed. If you think your cards might be out of date check for new cards here. This site has pdf downloads for all the V2 cards so you can update yours if they are V1. It also has great pdf game counters, reference sheets & more.
Errata & Clarifications: These are the offical errata & clarifications from Wyrd.
The Malifaux forums 'Nuff said.
Lastly but definately not least The Aethervox podcast. This is a great podcast with some fantastic fiction plus lots of other interesting bits & pieces. But the main thing it has is interviews with recognised experts on various masters. These are one to two hour long interviews where the expert goes through all the models for a particular master and covers how good or otherwise they are as well as in-depth tips & tactics. Masters covered so far are Pandora, Lilith, Lady Justice, Lucius, Ramos, Nicodem, Von Schill, Zoraida & Ophelia.