We're big fans of Automator here at Lifehacker, and the folks over at Mac OS X Automation have created a few services that let you share photos and links straight from your Mac.
If you don't particularly like Facebook's photo uploader, you can upload photos to Facebook straight from the finder with a simple menu item. It will ask you what you want to call the album, whether you want to create captions for the photos based on their filename or IPTC caption value, and more. You can also capture screenshots and send them directly to Facebook, as well as share selected or copied URLs as links on your Profile. It's a nice little collection of tools if you're a heavy Facebook user, so hit the link to check them out.
Note that when I used the installer on the page, it put the services in the /Library/Services folder, which didn't work for me. I needed them in ~/Library/Services. So, we've also hosted a zip file of the services by themselves which you can download here. Then, just unzip the folder and drag them into the ~/Library/Services folder, as shown at the beginning of this video. They should show up in your menu bar with no problem after that.