I think that the organizational features of Flickr will be great. I use photos for many, many projects -- personal and at work. I can keep great blogging photos in a "file", personal photos to share, to scrapbook, to archive, to "keep all for myself".
The possibilities are limitless. I also love the feature to
Use in the library? I do see this as a good alternative to kids Googling everything. I can filter the results as for safety (Advanced Search settings) and owner permissions (Creative Commons). I will probably set up a link on a search page on the website to see what kind of use it will get. Always an uphill battle with the easy Google search...
So much to do...so little time.