Hello,
Thanks for the invite.
I'm already working on a Groupon like website. I cannot disclose anything more because I signed a NDA
I've experience in creating and handling these kind of heavy scripts.
Can you please elaborate me what all features you will need?
I've setup a DEMO in case if you want to give it a look.
[login to view URL]
Demo is hosted in a shared server so it may be slow.
Regards,
Webpage Worker