How to index Sharepoint files with Lucene

[Álvaro Vargas Quezada]

Hi everyone!
I'm trying to combine Lucene with Sharepoint (we use Windows and SP 2010), but 
I couldn't find good tutorials or proven tests cases that demostrate this 
integration. Do you know any tutorial or can give me some help about this?
I have read all the "Lucene in Action" but here just talk about indexing files, 
and not integration with other softwares.
Thanks in advanceGreetz from Chile