Hi,

I've released IPAddress 0.5.0, first release to be public available.

http://github.com/bluemonk/ipaddress

IPAddress is an IPv4 and IPv6 addresses manipulation library, designed
to be easy to use. It is probably the most complete and powerful IP
manipulation library available today.

Some key features:

* support for IPv4, IPv6 and IPv4-IPv6 mapped addresses;
* easy handling of networks, broadcasts, prefixes;
* classless and classful (legacy) implementation;
* full set of conversion methods (bit strings, hex, unsigned
integers);
* network design features: subnetting, summarization, supernetting;
* comprehensive documentation;

IPAddress is already available as a gem on rubygems.org:

http://rubygems.org/gems/ipaddress

Migration from IPAddr should be seamlessly and pretty straightforward.
We'll soon write a tutorial on how to perform such migration.

Regards,
Marco