I'd very much like to be able to list my blog posts on a daily basis (used for logging work) - rather than have the Calendar plugin return the first post only.

There was some effort to do this as detailed here.

Set arbitrary date to be used by calendar plugin

I had a quick go at doing something similar on Debian Stable (Ikiwiki 3.0) but alas my Ikiwiki fu is not strong enough.

I'm not sure how I go about swapping the link on the day number to a link to, I guess, a dynamically generated page of links?

$linkcach{"$year/$mtag/$mday"}{$p} = ${p}

and a suitable whilst loop looks to be all that's needed...

Any pointers appreciated.

A patch has been proposed in comment

This has been applied. --Joey