PUBLIC MARKS with tags "not free" & online

Free during beta testing. Automatic remote daily backup of your entire blog database! BackupMyBlog only works if you have rights to install scripts on your blog server, upto 10MB.

fluxiom makes it easy to organize and share your digital assets within your company, your colleagues and friends. Nice design with simple features, basic account is 9$ : <a href="http://www.fluxiom.com/">fluxiom</a>

Mac is more than just an e-mail service, it’s an entire package from Apple. For $99 a year, you’ll net yourself an e-mail address that ends in “@mac.com”. If this cool moniker isn’t enough to turn you over to the side of Jobs, the additional features of this service will. You can publish photos for everyone to see, have a personal webpage hosted for you without the need to worry about bandwidth, keep multiple Macs in sync with each other, have blogging capabilities, get free storage with iDisk for backing up files, and a whole lot more. Though $99 may seem a bit expensive at first glance, remember what you’ll be getting with it. This e-mail service is not recommended for Windows users since you won’t be able to take full advantage of the .Mac services offered.

web-based software that provides small teams with email, calendars, contacts, files, and shared applications. 15$/month

It's an open source server and client system for enterprise messaging and collaboration email, contacts, and group calendaring. It has open APIs and a lot of potential for mashups. I was very impressed, desktop type interface with filders and tags.

Box.net is a virtual storage space for your computer files. With packages starting at just $4.99 per month for 5GB