primary bonus of mongrel 1.0.1?

Hello,

I've completed the update of all my servers to the new mongrel.  No 
problems whatsoever to report, well done.

But, I have some colleagues who are wondering what the primary 
improvements are to mongrel with this new release.

I read the Change log but it was a bit cryptic for me.

Can anyone provide an executive summary of why 1.0.1 is better than 0.3.xx?

a few main bullet points would do fine...

Thanks,

Andy Koch