DavidB let me know that Mezeo just released a BlackBerry client for their cloud storage platform. Mezeo sells a cloud storage solution that helps companies collaborate and share files. The cool part is that they now have a slick looking BlackBerry client that gives you access to this cloud storage from your BlackBerry. This is not meant for a the regular consumer but they might have a consumer solution in the future.
Their BlackBerry client lets you upload files from your BlackBerry. It also lets you download them and open them with the native BlackBerry file viewers. Permissions are also built into the system making and it looks like a combination of a custom FTP and a WebDav setup.
You definitely want to check it out if your company is looking for a file collaboration solution. You can find more information at this link.