I went to a liberal arts school, so I may be a bit harsh, sorry. I'd be more than happy to look at specific bits if you'd like me to. This is all from a quick read.
Choosing a Bird reads as very confusing. I'm not really sure what you're trying to communicate here. So, I should get a budgie, then a sennie, then a conure and THEN a Macaw? There are better ways to get bird experience and prepare for owning X species, than serially owning other species that may not actually be what the desired species is. What about the budgie that gets 'replaced' by a GCC? That's a disservice and devalues the smaller birds. Maybe just rank them in terms of difficulty and suggest other ways people can get good experience like volunteering with rescues, loitering here on AA, and helping current bird owners care for their bird or pet sit? I believe that a novice bird owner, with the proper dedication, education, and interest and support is perfectly capable of owning an amazon if that is the bird that fits best in their life (though I certainly wouldn't expect them to take on a bird that needs rehabilitation). On the opposite end of the spectrum, there are many people who have owned many other birds that I wouldn't let near Jasper. Previous bird ownership does not equal quality home.
Parrot Noise Levels I don't see the promised website or a graph on this page. Only a chart. I would suggest adding something along the lines of 'frequency'. Budgies chatter ALL DAY LONG which drives some people up a wall, while another bird may be louder, and more shrill, but only yell for 10 minutes two or three times a day and be much more tolerable in some homes.
Choosing to Adopt mentions a lot of issues that adopters of adults need to be ready for. It would be helpful to point out the issues baby birds have too- feeding regression and puberty issues especially.
Have you had problems with breeders misrepresenting themselves because they know you won't adopt to them from your website?
Behavioral Issues and Understanding Hitting, ect are actually Positive Punishment. Positive means adding somthing (hit, smack, treat, cookie) Reinforcement is anything that makes the behavior happen MORE, punishment is something that makes it happen less. Vicki has a sticky explaining it more clearly, here:
http://forums.avianavenue.com/training-court/4946-learning-theory-basics.html
I like your diets page, having a list of no-nos, or a link to one might be helpful
I much prefer the pages where there's the navigation bar on the left and then a single content block on the right rather than having the bar on the left and then another two columns in the content sections... it's too confusing. In a couple of places you continue text in the columns after a picture, and that's not very clear- the reader has to search for where the other half of the sentence and/or paragraph is.
I personally find sites and posts 'from the animal's point of view' very irritating. That's just my personal preference though, and I know many people do like it. JMO. I'd rather learn about the animal's actual behavior, not what the people writing the post think the animal is thinking that leads to the behaviors.
I love it.
I really love the part about the cages: "Use the brain, people!" If you can get them to understand that one simple thing, you'll have really accomplished something! 
like what kind of home they want, their age, name etc....
I think there are several here with pretty fair educations, Sharpie 
