Maximum PC

I am in the process of creating a directory structure, and need to create several nested directories to help sort out data on my website...

I'm running Apache 2.215 (I think) and it's on a Linux server...

Here's what I'm looking of doing:
(from the root folder, this is who I'm planning on creating the structure...)

/content/photos/2009/event1/large/
/content/photos/2009/event1/thumbs/
/content/documents/reserachpaper/resources/
/content/audio/clips/meeting1.mp3


How "deep" can I go in the directory structure (as in, how many directories within directories) can I have before it poses a problem or threat to the safety of the system (apache) or the OS (linux)??? Or just simply, what is the limit for nested directories?

If your computer is EXT3 then its 32,000, if its EXT4, then its 64,000.