I'm a Meebo.com and Ping.fm fan. I use Meebo specially while roaming around where open Wifi speeds are not so good such that regular IM clients will keep on disconnecting. However I find it hard to use Meebo with Ping.fm IM bot since Meebo doesn't have 140 character counter. If you post a status more than 140 characters long, it will be truncated by Twitter or Ping.fm IM bot will totally ignore it.
So I created the Meebo 140 Counter for Greasemonkey. I have tested it to work with FireFox 3.5 but it should have no problem with lower FF3.0+ users.
If you are new Greasemonkey here is a quick how-to from UserScripts:
Greasemonkey is an extension for Mozilla Firefox, an open source Web Browser. Most userscripts are written for Firefox & Greasemonkey (although some work in Opera, Safari and even Internet Explorer).
For this guide I will assume you are using Firefox, if not you should install Firefox first.
Userscripts run via Greasemonkey
Now that you have Firefox, you need to install Greasemonkey. After installation (which requires restarting your browser), you are now ready to install userscripts.
Now clicking on a .user.js link triggers Greasemonkey to pop up the script installation panel. Greasemonkey shows you a list of what sites the script will run on and ask if you want to install the script.
Now loading a web page results in additional code (the userscript) being run.
Finally if you encounter problems with the script not working, please file it at the UserScript Issue Page or drop me a comment here.