I really wish they would,
Ditto..
I've been searching for months for a vB integrated cart, I purchased MicroCart a few months back but it turned out to be far too buggy and poorly coded to be of any real use.
The only other option I found was a Magento integration by AITOC, which is way over the top for my needs.
I just need a cart to accept annual Association Membership payments, Monthly Subscriptions and to sell a few promotional items like T-shirts, Caps etc. with payment options like PayPal, PayPal Subscriptions and Direct Deposit/Bank transfer.
I truly don't understand why a simple cart system isn't something built into vB4 or at least the vB4 Suite.
I could use a simple cart like that for my web hosting site!
If you're serious about hosting and it's not just a minor side-line you should consider using something like ClientExec.
I was involved in it's development and testing back in 2002/03, with my own hosting company and it was developed specifically for hosting.
Not sure what it's like these days or it's pricing but it's a good place to start.