To date, I have always used dry yeast (with no problems) but I made a beer yesterday using WLP001 liquid yeast from White labs. For my dry yeasts, I usually soak them for 20 minutes or do up a little starter but with the vial of WLP001, I just shook it up and pitched it. Took a skeptical look at it this morning and it is bubbling like a whore in church. I am surprised it hasn't blow the airlock off with how its going. Must admit that I am somewhat impressed.