This is something useful for small teams using contractors. Visualize
yourself at the client site. You need to share code with some of your
team members who are offshore or geographically distributed. The
client has a source code repository (or maybe not, but you can install
one there.) But the client does not give outside access through their
firewall - and they don't want you sending stuff back and forth via
email because they think it is insecure. So what do you do?

There is a good site, www.ironcitadel.com, which permits the secure
storage and communication of documents. Unlike most "free" sites, this
site is:
(a) Securely encrypted - all document uploads/downloads are 128 bit
SSL encrypted; all documents stored are encrypted using the new
Rinjdael algorithm which has replaced Triple-DES as the US government
high security standard.
(b) Has a fax feature - if you just have a hardcopy of a document, say
a handwritten note, you can fax it in and the document is received by
a fax server, converted to TIFF format, and stored encrypted. This is
great if you used one of those "printing" white boards for
architectural diagrams or flow structures.
(c) All documents can be downloaded (also uploaded) just via a
standard web browser - no special software required.
(d) Cost is dirt cheap - $5/month and you don't even pay until the end
of your first 30 days. Considering what you get, that is CHEAP!

If you want to communicate securely with someone, just set up an
account and give the login/password to a single other person (or a
couple people). As long as it is a limited number of team members the
site will let you use a single member ID. If you want to store secure
team development documentation and source, and get the benefits of a
backup storage repository at the same time, then www.ironcitadel.com
is the place.