Metal Gear Online beta hasn't been the broken beta keys, the huge patch and client download or even the delay. It's trying to get a Konami ID from a website that simply refuses to work. Thankfully, that's in the past. Konami has retooled the ID registration website to be much more streamline and, as a result, much faster for all involved.
So if you haven't managed to get your hands on a Konami ID, now's your chance. Make sure you get one before Friday the 25th so that you can jump straight in once the beta begins. So long as it doesn't get delayed again, that is.