If the utility of your new startup is directly related to the number of users using the service, find a different hook to get people actively using it.  Unless you’re amazingly good at managing the customer lifecycle, I won’t come back after checking it out once and getting bored.  Find a way to for me to get value out of it as an individual first.

Lenovo - My account

So do you not want my business or what?

Oh, and obviously, Java totally sucks.

Update: Apparently in Lenovo-speak “Save Cart” means “Empty Cart.” Jerks.