Symlinks! They’re not just for Christmas. They are, in fact, just like aliases, enabling you to litter your hard drive with shortcuts in no time flat. You can make them in the terminal with the “ln -s” command, but if you’ve got the windows open in the Finder, hell! Why not use ‘em?
This little baby uses the front two Finder windows to figure out the source and destination. Just be careful that they are the front two windows, or you may get unexpected – perhaps terrifying – results. I took the time to build in a confirmation dialog; just edit the code if you feel like living dangerously.
The source code dances a merry jig, over yonder.
Download Symlink-this-window-to-that-one.rb.zip.
Web designers, in particular, are famous for making Photoshop files with 134 layers, all named “Layer 2 copy copy copy copy”, and spending an hour turning them on and off to show you one iteration of their handiwork. Using Photoshop and not using layer comps is akin to chartering a Gulfstream jet – and then taxiing to your destination. 
This has actually been added as a command in the latest release of InDesign (curse you Adobe, for improving your software and rendering my scripts obsolete). It still serves as a useful example for how to filter a bunch of objects based on a selector.
This script, erm, duplicates the functionality of simply looking at the bottom of the iTunes window, where you’ll find the total size of the current playlist smugly peering up at you. So why did I write this? Your guess is as good as mine. However, in the name of providing examples for would-be iTunes scripters, I present it here in all its redundant glory.
The clue is in the title. This is especially handy when you attach a keyboard shortcut with a utility such as – the frankly indispensable – 
What, you might ask yourself, is the point of this script? Can’t I just drag images into Keynote? Well, replies this hastily anthropomorphised bunch of code, you could do that. But your images will be strewn hither and thither, rather than nicely centered on your slide. Quod erat, as my uncle would say, demonstrandum.
Open for Business, Yes Sir
You’d be forgiven, of course, for thinking that this blog’s maintainer had just been deported to Russia for spying – such is the rate of updates. This, sadly, is not the case. The real reason is far more prosaic: I have been distracted.
However, the Internet toils tirelessly whether I’m paying attention or not. One tireless toiler is Mike Hall, a guy who has more rb-appscript prowess in his little finger than I have in my entire hand. He kindly pointed me in the direction of his blog, which has a terrific array of ruby scripts. It’s so good that I’m going to put it on its own line:
http://mph.puddingbowl.org/category/ruby/
If you’re jonesing for more
app("Grue").do_some_stuff({:like => "now"})then I highly recommend you check it out. I plan on porting Mike’s scripts over here too, so that they’re preserved for posterity, but mainly so I look like I know what I’m doing.