I have just released opencart 1.5.0.

You can download it here:

http://opencart.googlecode.com/files/opencart_v1.5.0.5.zip

Bugs can be reported here:

http://forum.opencart.com/viewtopic.php?f=161&t=33915

There is currently no upgrade script but one will be released soon.

New Features:

• Reward Points System
• RMA System
• Grid, List Product listings
• Gift Voucher System
• Credit System
• Reorder System
• Wish List System
• Affliate System
• Option Text Fields
• Banner Manager
• One-Page Checkout
• etc..