StatusNet; a Twitter Alternative

[HiddenKnowledge]

The following software packages are *required* for this software to
run correctly.

- PHP 5.2.3+. It may be possible to run this software on earlier
versions of PHP, but many of the functions used are only available
in PHP 5.2 or above. 5.2.6 or later is needed for XMPP background
daemons on 64-bit platforms. PHP 5.3.x should work correctly in this
release, but problems with some plugins are possible.
- MySQL 5.x. The StatusNet database is stored, by default, in a MySQL
server. It has been primarily tested on 5.x servers, although it may
be possible to install on earlier (or later!) versions. The server
*must* support the MyISAM storage engine -- the default for most
MySQL servers -- *and* the InnoDB storage engine.
- A Web server. Preferably, you should have Apache 2.2.x with the
mod_rewrite extension installed and enabled.

Your PHP installation must include the following PHP extensions:

- Curl. This is for fetching files by HTTP.
- XMLWriter. This is for formatting XML and HTML output.
- MySQL. For accessing the database.
- GD. For scaling down avatar images.
- mbstring. For handling Unicode (UTF-8) encoded strings.

source: https://gitorious.org/statusnet/mainline...ter/README

Doesn't seem like it will be unsupported by many webhosts, I think.