IMOHO, the SB-600 is really pretty idiot proof. An accessory you might want to consider is a SC-17/28/29 sync cord which allows you to move the flash off camera while retaining full iTTL capabilities (think of it as a hot shoe extender). Moving the flash off camera can make a world of difference - even if you just hold it to the side with your arm. The older SC-17 is electrically identical to the SC-28, and you can pick one up on eBay for about $25.
I was just looking at the SC-28 actually, looks like it's something i'll add to the arsenal shortly! i was also looking at a cheap-ish radio transmitter/receiver on ebay to use it wirelessly, i assume i'd lose ttl etc though?
SB-600 and the sto-fen omnibounce arrived today and wow, what a difference bounce flash makes, i can't wait to experiment some more with it and learn some other techniques. I'm definately glad i chose this over the sb-400, being able to swivel the flash head is reason alone to choose the 600 over the 400.
I'll need to sit down and read the manual sometime, it's almost as thick as the manual for the camera!!
The flash is excellent, the difference it's made to indoor shots is like night and day, being able to bounce it really is a vast improvement.
You're right aswell, i really want to get the flash off camera now, so i've been looking at the cords/radio triggers, but while the pocket wizard looks like an excellent setup, it's also pretty expensive and i can't really justify one right now! so i'll be looking at a simple wired solution, or possibly one of those cheap ebay radio triggers.
SB-800 would be nice aswell, im sure the more i get into this, the more i'll want one!
You can start like most of us did with a synch cord. The SC28 and SC29 cords are the current Nikon models, and are not inexpensive. The older SC17 cord is electronically identical to the SC28 but you will have to find one used. I've seen several sell on eBay for under $30, but watch the shipping costs some of the dealers charge. All of those cords will allow you to mount the flash off camera and maintain full TTL function.