queueing and submitting reports

i am just wondering if anybody knows of any third party software, or a
good way to implement the following using the webservice.
in our current reporting engine (inhouse designed)
users can select a report, select the parameters and submit it to be
run, when its complete it shows up in a sort of inbox, and then can
select one or more and click PRINT ..
i'm wanting to implement the same sort of workflow in reporting
services because reportmanager just doesn't have good workflow for such
circumstances.
any ideas, hints, systems out there that already do this would be
appreciated. whether rs 2000 or rs 2005
in implementing it manually i see a problem with the fact that the
'prequery' i.e getting parameters from lookups is done at the same time
that the reprot is run.. is there a way to intercept just the parameter
gathering GUI and gather the parameters from that (so that we can make
our own queueing and rendering via the webservice engine?)
Karlno ideas anybody?