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Would be a very nice feature but relies, as Burning already said, on using a central XOOPS module repository I guess. In practice too many module developers use their own websites instead of sourceforge. When looking for latest modules you have to look around and must be a google expert to find the newest release in many cases. Same problem is with finding translated versions, which can be everywhere on local XOOPS sites or elsewhere on private sites.
We are busy revitalising xoops.nl at the moment and what to do with translated modules is an issue. Looking at the current situation we decided to have our own donwloads module with Dutch translations, but it would be better to have a stable central repository with all modules and translations at one place. This can also prevent panic situations as recently occured when Hervet had to close his site.
In my opinion a stable central module repository is a must have for XOOPS to survive.