Is it an acceptable practice for an interviewee to bring notes to a job interview?

So a month and a half after posting this, here is where things stand:

I went in dressed business casual, believe anything more would have been overdressed as I was the only person in that office wearing pants and sleeves, and asked about the job. They gave me an application and filled out my contact info and such and got to the back of the sheet where they asked for my work history. I asked if they wanted me to fill it out because I had my resume with me. They said I needed to fill it out so I copied all the information that I had just spent the whole morning typing up into the tiny spaces on the sheet.

When I finished, they looked it over and asked me a few questions and told me some things about the job. They seemed genuinely interested and while talking said "We will probably start you out at..." and then proceeded to look at my salary history and gave me a number that was higher than the starting salary in the job posting which seemed like a good sign to me. They said they would call me later in the week to set something up.

I went in on Monday and didn't hear from them the rest of the week. I called the following Monday and they seemed upset that I called but asked if I could come in on Friday. My interview went great. They showed me around the place. It seemed like we did more chatting than actual "interviewing" and I asked lots of questions about the job and the company. They said they would call me next week and I felt good about it, but I feel good about every interview.

A week goes by and I don't hear from them. I finally call them Wednesday the week after they said they would call me. They tell me they've been very busy and haven't had any time to think about it. Also, one of the people who is involved in the hiring process is on vacation on this week and next so they will call me on Monday (1 and a half weeks from now) when she gets back and included the word promise.

Well that Monday comes around and guess what? No call. I figured it's a Monday, things got busy, I'll call on Tuesday. I call on Tuesday and they tell me they are very interested in me, they want to bring me on board, they're very busy and need the help. Great. But they also say they need to speak with their accountant (who is very busy) because they need to "get some things in order" before they bring someone else on. Give us a few days they say and we'll get back to you.

The last time I spoke with them was August 17. They are a very successful business, been in business for over 30 years. My aunt does a lot of business with them and has said they are usually very slow with things because they have so much work. They have a two person office staff. I can somewhat understand what is taking so long but it also sort of feels like I am getting the run around. If you don't want me, just tell me. I'll be upset but I can move on then. I'm sure some of you might be wondering why I would want to work at a place like this but I hate my current job, I can pretty much make my own work schedule, and I would actually being doing something I enjoy for a change.

I was thinking about this a few weeks ago but I have basically been in a continuous 7 year job hunt since I finished college. My only real big boy, grown up job I had lasted all of 4.5 months before I was laid off. So I wish I could say that I'm used to dealing with this type of crap but I'm not. And it doesn't get any less frustrating.

Called this afternoon and got the so and so just stepped out they'll call back in a few minutes. Never happened. Called again before they closed and was told they are still trying to figure out the pay rate "so that it is fair for everyone" and they will talked with so and so on Tuesday when they are back in. When I called this afternoon I spoke with that person. You couldn't have talked about it after that? I really wish I didn't have the combination of hating my current job so much and loving so many things about this potential job so I can tell them to just forget it. They also said they would call me back on Tuesday. So far their track record for calling me back AT ALL when they say they will is 0 for every time.