I wrote a post for GigaOM today on startup Nusani, whose approach to cloud storage is worth noting here, too. Nusani’s virtual-appliance-based offering is a full-featured filer that taps into existing cloud platforms (e.g., Amazon S3) to actually store the data. Cloud providers don’t want to get into the business-grade storage game, so they’re partnering with Nusani as a value-add to their services. Also, check out the news of Eucalyptus and Terracotta joining forces. Eucalyptus needs partnerships to add value to its EC2-inspired software, and Terracotta is a great one for scalability-hungry web apps.