Nexternal provides an XML Toolset to enable integration with third party applications. Should you not have the in-house capabilities or time to perform such an integration, you might consider hiring one of the following integration companies:
FarApp Web Services
FarApp Web Services offers an automated hub to integrate your Nexternal ecommerce systems to your central business system. Automated features include:
For just $200/month, FarApp will automate the communication between Nexternal and NetSuite.