I've been using .mac for the last year and very happy with it. I use it only for my work files but wanted a place to keep 'acquired' progs and apps etc.

http://www.amazon.com/gp/browse.html?node=16427261

Amazon S3.

Pay as you use service which is cheap:

Storage
$0.18 per GB-Month of storage used
Data Transfer
$0.100 per GB - all data transfer in
$0.170 per GB - first 10 TB / month data transfer out
$0.130 per GB - next 40 TB / month data transfer out
$0.110 per GB - next 100 TB / month data transfer out
$0.100 per GB - data transfer out / month over 150 TB
Requests
$0.012 per 1,000 PUT, POST, or LIST requests
$0.012 per 10,000 GET and all other requests*
* No charge for delete requests


If anyone is interested in setting this up then let me know and I'll put a post together.