Personal Wikis

I have been looking for some software where I can brain dump all the things I need to remember on a constant basis so I can easily find it again in the future. A personal wiki basically. I am wondering what any of you tilderians are using?

The things I am looking for:

Absolute requirements:

• Open Source: I want to be in control of the data myself, and I want to be able to hack on it myself as the need arises.
• Self Hostable: Goes hand-in-hand with with open sourceness, I want the data to live on the server in my apartment, under my own control.
• An API of some sort so I can programmatically add/read/modify data.

Nice to haves:

• Revision history of some sort.
• Common/simple data format for easy backup and longevity.
• Web interface, with mobile compatibility.
• Lightweight as possible, so I can run it on a low powered server.

Does anything know anything like that?

Options I have heard of:

• TiddlyWiki
• DokuWiki
• MediaWiki
• ZIM
• Emacs with Org Mode

Here is a previous discussion on the topic @ Lobste.rs