Don't worry, it is much easier and better predictable now:
- It is always two brackets (for links) or two curly braces (for transclusion/embedding) now.
- Because of that, macros use <<MacroName(...)>> syntax now. 
- Use brackets or braces syntax if some target has blanks chars (no _ and no %20 any more!).
- Use the pipe char (|) to separate target and text (and params).
- wiki: is gone, just use interwiki without it. 
- inline: is now {{attachment:...}}. 
- Interwiki links now only use WikiName:PageName (not: WikiName/PageName) 
- It has less magic now (and will just do what you say!): - Underscore (_) is a normal character and different from blank.
- If you want an underscore, use an underscore - if you want a blank, use a blank.
- If you link to an image, it will just link to an image (not show/embed it!).
 
- For early moin 1.6 users: no quoting with double-quotes any more, use outer double brackets/braces to quote.
 This markup is inspired by creole wiki markup standard (and is also quite similar to what mediawiki engine uses).
 This markup is inspired by creole wiki markup standard (and is also quite similar to what mediawiki engine uses).