There is a large amount of companies offering online backup.
It all depends on wheather your a business or an individual:
For individuals who want very basic backup i'd go with carbonite...
Its €40 a year ...
www.carbonite.com(not monitored or managed)
For businesses in Ireland looking for Email/Exchange/SQL backup and a fully monitored solution your better off going for one of the big Irish players such as
eircom net Homepage,
keepITsafe Online Backup : Automatic, Offsite Backup or
Broadband - High Speed Connectivity - Magnet Entertainment. Eircom V.Expensive, Magnet ok, keepitsafe ok!!
Make sure whoever you go with that they are backing your information to 2 seperate datacenters and they're services are professionally indemnified.
Jonny