Microsoft runs a regular Office 15 minute webinar and recently it focused on SharePoint Online. You can find the video at:
If are interested in getting started with SharePoint Online this video will give you a brief overview. Once you have watched that you can also check out the CIAOPS SkyDrive Pro Primer video:
There are of course plenty of other SharePoint and Office 365 publications over at:
So take a look, however if you haven’t looked at SharePoint and especially SharePoint Online then I’d strongly recommend you do.