I have looked around in the code, on this site, and on the list on flatearth, and it appears as if there are no action hooks available for installation. I am working on a project where we will be rolling out wp with our custom plugins to a number of sites, and we would prefer it if we could also write a plugin that would perform various database tweaks immediately upon completion of the installation.
I am proposing that an action be added for post-install, and, if possible, earlier in the installation, as soon as it is feasible to execute plugins (we're actually using wpmu, so no need to activate the plugins)
I would greatly appreciate any thoughts on this!