Peer Review 
I like how you've organized the wiki page. It's very logical, and has a lot of detail, that are all linked to other pages, which is great. 
However (there's more detail in the rest of the post) it would be helpful if you fleshed out your intro, and intros to other sections. Otherwise I have no idea for what information this page has to offer at first glance. The sections themselves are very dense with information, which is good, but it can also be a bit confusing with no diagrams as a visual aide. If you can find some diagrams for sections "uORFs" and "Reinitation" it would be helpful. 

Introduction:
"differing mechanisms dependent on organism." sounds awkward. Also you should provide more detail on the different mechanism
General Structure:
Length: I like the example you give to demonstrate size difference. 

Role in Translational Regulation:
I think it would be helpful if you had a small overview section "Role in Translational Regulation". The section is split up in a very logical way, but it feels a bit disjointed. The overview might help a person approach each section with a greater picture in mind. 
Prok: Is there a page that outlines the mechanism of Prokaryotic Translation? It would be a good idea to link that information to this section. You say "many other proteins" are recruited, which opens the question of the actual process. 
It would be good if you include more details on how 5' UTR can be mutated, and what kind of defects it can lead to. 
It might also be a good idea if you include more information as to what model organisms were used to determine some of the experimental results.