Hi Bastien, thanks for the prompt reply.

Bastien writes:

>> When exported into an agenda, the consolidated org agenda would read:
>>
>>     Friday   19 April 2013
>>       customer:  09:00-09:30 Scheduled:  TODO Meeting with Pete
>
> The problem is: what would RET do on this agenda line?  Go to which
> entry?  You can always put some hacks in `org-agenda-finalize-hook'
> but it's easier to try to keep your Org files clean ;)

I would assume that RET would jump to the source item (the one with the
"See also" property).  It's unfortunately difficult for me to keep my
source files clean: my schedule is composed of three different and
unrelated sources, which vary daily.  I export those sources to three
different org files and combine those with my personal schedule to
figure out what needs to be done every day.

Since the exported sources get overwritten, I have to copy each event
into my own (clean) org file and then unschedule the exported one, to
keep the agenda clean.  It's... silly, but it mostly works.

If anybody wants a spreadsheet-to-org-file exporter, just let me
know. :)

Nick