Didn't see this posted yet here, but obviously lock if old.
Ok so earlier I was browsing GAF when I came across this thread. Apparently this guy had a DualShock 4 and was showing it off via an unboxing video. A lot of people in the thread then started to mention how PS4 accessories were not street-dated. This obviously includes the DS4, and I was pretty skeptical that they would be out this early. Fast forward to my drive home from school later in the day. I decided to stop by my local Gamestop to see if this was true. The girl working behind the counter was surprisingly helpful, stating that DS4's were in fact not street-dated, and that they will start selling them as soon as they get them. I followed up on that part, asking when they would have them, and she looked up the shipments to that store and said in all likelihood they will have them and start selling them at some point next week.
Long story short: If you want to try the DS4 and there is no fancy Sony thing set up near you, or is you just want one to use on your PC before your PS4 shows up (this is my situation) be on the lookout for stores stocking and selling them very very soon, if they aren't already.