Picture libraries allow you to access a photo album and view it as a slide show or thumbnails or a film strip. You can have separate folder for each event, category, etc
What are the advantages of a hosted SharePoint vs. one that is on an in-house server?
* No hardware investment, i.e. lower costs
* No software to download - ready to start from the word go
* No IT resources - Anyone who has used a Web program like Hotmail can use it
* Faster deployment