I was thinking of starting a new character in a game I currently play in. What are your general thoughts on this mulit-class combination, and can you suggest or recommend any feat/skill combinations, weapon specializations, etc...
Someone made the point, before, that Warlocks are a little too specialized. They only really do one thing. The Warlock/Rogue combination probably makes it a bit better. The Daggerspell Mage is a pretty good Rogue/Caster prestige class you might want to look into.
But feat/skill combinations? You're going to have to give us a character concept first. What are you wanting to do?