Flickr is really great. I joined a couple of weeks ago, but I only got a chance of doing some serious setup with it.
I'm using the following tools:
- iPhoto plugin for flicker: really really simple way of uploading you photos directly from iPhoto. It lets you choose the title, tags and even resizes the photo before uploading. The current version (0.7) has a small bug: it strips the EXIF information, so it's not really ready yet, but the author is looking into it;
- Flickr Screensaver: really nice, but could be better: I would like to be able to choose to see all my contacts photos instead of my own only. You can choose to see favourites, which is nice;
- Keyword Assistant: not really Flickr related, but if you use iPhoto, this will help you tag all your photos and that makes it easy to upload them to Flickr.
- Don't forget that you can upload photos via email, and even better, you can also post a photo to your weblog via flickr by email. It's twisted but it works: just setup you blog in Flickr, and add a email address to it.
And now the wishlist: open the Pro Accounts soon, 10Mb upload per month is not enough :)