nopCommerce v1.40 has been released and can be downloaded here
Highlight features:
1) W3C compliance (XHTML)
2) Admin area localization
3) Paypal IPN (Instant Payment Notification)
4) FedEx shipping provider
5) Export/Import customers (Excel) - doesn't work in medium trust
6) Export/Import products (Excel) - doesn't work in medium trust
7) Export orders (Excel) - doesn't work in medium trust
8) Private messaging
9) eWay payment module (hosted solution - UK, NZ, AU)
10) "Fixed rate" shipping provider
11) "Fixed rate" tax provider
12) Product specifications: Multi-Value (pre-defind). Store owner can define multi-value Product specs, such as Processor (AMD 64X2, Intel Core 2 Duo), and not having to repeat them typing again and again for each product
13) Product specifications: Filtering by specification on category/manufacturer pages (e.g. color, size)
14) PDF Order receipts - doesn't work in medium trust
15) Unlimited textbox product attributes
16) "Customers who bought this item also bought" option
To see the full list of fixes and changes please visit the release notes page.