I am a person who plays shmups a hell of a lot. Not a full blown expert (not sure what quantifies as an expert anyway), but I will help you as much as I can.
A fairly detailed glossary on shmup terminology can be found at this thread over at the Shmups forum:
http://shmups.system11.org/viewtopic.php?t=9665
As for strategies to the shmup genre, well... the type of strategy for one shmup may not necessarily work for another, and strategies can vary wildly depending on the orientation (vertical vs horizontal), developer (e.g., Irem games play very differently than Konami games), shmup type (manic vs methodical), hidden features (rank, location and size of hitbox), you name it.
In creating a strategy guide to the genre, it may be helpful to go from general aspects of the genre (such as vertical vs horizontal strategies or methodical vs manic strategies) and then go more toward more specific strategies (such as understanding hitboxes and rank).
Let me know what you want and how much detail you want to go into and I'll give you as much information as I have on it. I hope this helps!