What I'm wanting to know - is can you create a plugin for a weblink? In other words, I go to the website, drag the url into a weblink on my desktop (or wherever), can I then create a behavior for that weblink, so it will automatically "load" it, etc.? I'll try tonite, but would be interesting to know ahead of time (or if there are other issues, etc. regarding that type of use).

Thanks. 

You've multiple possibilities:

1) Creating a menu item 
a) Drag a link from f.ex. Safari to your Desktop or a folder of your 
choice. 
b) Just drag the created webloc-file into your custom menu (at Prefs > 
Menu)

2) Create a custom action 
Create a custom action with this AppleScript in it (replacing iospirit.com 
with the URL you want to open): 
tell application "Safari" to open location "http://www.iospirit.com/"

HTH.

Best regards, 
Felix Schwarz