Don't think Moodle HQ has the time to get involved in something like this.
A Moodle Partner might, but why would they? With most MP's think you host with them and they do the backend ... customer has no shell/other access.
So am thinking this 'service' would be for 'the little guy/gal' - and a 'community' type effort ... sorta like all things open sourced ... couldn't say if it was 100% reliable. But, couldn't hurt to try if the try is done safely.
As to the matter of trust with data ... it's only converted ... it's not tested with any Moodle site ... the DB iused for the conversion would be the same one each time. Thus only one customer at a time. Converted DB would be dumped to an sql and the DB used cleared of all tables for the next 'customer'.
The only checks done on the converted db would require superuser to DB server. And that's one of the hang ups with shared hosting plans ... not superuser of DB server, don't have priv's to do some things.
The dumped sql zipped and provided via web link for 'customer' to download.
Things I don't know about yet ... unless I get come 'community volunteers' to help test ... a large DB. Might time out ... might have network connectivity issues ... may not be able to use the tool in their own Moodle to migrate the DB to this conversion server.
How about this ... you already have a method/way to do this ... via MAMP ... wanna be a 'partner' and give it a try?
PM me with your EMail address and we'll take communications off list for now. I'll have to provide you info like IP address, db user, db password, etc.. Later, we both can give our evaluaton as to doable or not. ;)
'spirit of sharing', Ken