One Prisk, two Prisk, red Prisk, blue Prisk: check your PMs :D 

Now, to your post:

Honestly, I just can't do it. I can commit to continuing to post regularly. I cannot commit to hard deadlines. There are three reasons for this:

First, as a writer, I take a long time and I underestimate how much time I need. 
Second, RPGuild is not and can never be my first priority. There's something like a dozen other things that come first. Those things will push RPGuild off my schedule sometimes.
Third, I do this in my spare time, and the nature of that time is unpredictable. I don't know what my availability is like week-to-week. Some days, like today, I check the forums multiple times in a few hours. Sometimes, I don't check them at all 

I totally respect the goal behind the idea, I like the idea of consistency and if I were writing for TSW in a professional capacity, I would be totally in support. Since I'm not, though, I have to balance behaving professionally with keeping my actual real-world obligations in mind. I try hard to keep everyone advised of my plans and my schedule, but I only have so much control over the factors that go into my availability; not enough for this kind of scheduled posting. 

What I COULD do is write a number of posts and schedule the time when they'll be posted AFTER they're written - but I don't think that's fesiable with our structure.