Hi - I'm now the owner of MP3::Info, after taking it over from pudge.
Myself, working on behalf of my employer - Slim Devices, have made significant performance improvements to the MP3::Info codebase. As well as supporting & parsing tags such as RVAD (Volume Adjustment), TXXX frames and more. There's also support for reading APE tags stuck in the ID3v1 space which many use for Reply Gain information.