Sort of a like Word except implements latex?
I use MathType, which is good but expensive.
The main issues are that I can't include diagrams or tables using it.
When you say "implements latex", do you mean just the equations like here on PF? Because LaTeX is actually a full mark-up language for typesetting documents, so you don't need a word processor at all once you get the hang of it.
If you want something WYSIWYG (What You See Is What You Get--like most word processor applications) you can use LyX, which acts as a front-end to LaTeX:
I use the TeXnicCenter/MiKTeX combo on my windows machine. I wrote my thesis with it and highly recommend it.
Of course you can use word to write Latex. Just save it as a txt file :-)
Seriously speaking, one of the advantages of Latex is that you are in fact programming your document using a simple text file. If you get used to a good editor like emacs, vim, etc, you have mighty tools available to help you, e.g. regex search and replace, column wise editing, macros for inserting commands, references etc.
Separate names with a comma.