>>7
Tinyboard can be very fast too, plus all the features. The site I run gets at least one post every 3-15 seconds, 24 hours a day, and Tinyboard is able to handle it fine, without utilizing a lot of system resources.

Some unique features of Tinyboard include:
- Optional per-board detailed configuration files: http://tinyboard.org/wiki/index.php?title=Config
- DNSBL: http://tinyboard.org/wiki/index.php?title=DNSBL
- Load balancing: http://tinyboard.org/wiki/index.php?title=Load_balancing
- Varnish/squid and APC/Xcache/Memcached integration: http://tinyboard.org/wiki/index.php?title=Load_balancing#Caching
- Running across multiple servers: http://tinyboard.org/wiki/index.php?title=Multiple_Servers
...and a lot more.