Where can I find (not too expensive) unlimited online storage?

http://mozy.com/ is by far my favourite for online automatic backup.

I would take a look at Amazon S3.. It might not be the easiest to work with but it is cheap fast and reliable.

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

Pricing:

Storage
$0.15 per GB-Month of storage used

Data Transfer
$0.10 per GB – all data transfer in
$0.18 per GB – first 10 TB / month data transfer out
$0.16 per GB – next 40 TB / month data transfer out
$0.13 per GB – data transfer out / month over 50 TB

http://box.net is another option

2nd amazon s3—really cheap and plenty of available interface options

I second box.net, I’ve been there since alpha testing. Good stuff.

I love box.net for everyday use and its widgets
But if you want just plain storagem I would recommend ADrive which gives you 50gbs of free online storage space