As you search for posts alphabetically, you can also search for comments alphabetically. Pass an argument ‘search’ with a value that you want the comments to be searched for to the ‘get_comments’ function and you’re done!
Example:
$comments = get_comments(array(‘search’ => ‘z’));
The $comments variable will contain all the comments which have the alphabet ‘z’ in their content.
Simple ehh? 
Issued in developer interest by Rutwick.
This is a common problem faced when using Skype on Ubuntu. After logging into Skype and closing it, if you try clicking the Skype icon, it will open up a new Skype instance (unless you have the quick launcher pointing to the active instance of Skype, which glows in green when logged in). This is very irritating as neither can you log into Skype again as you’re already logged in, nor can you find the active Skype instance.
To get rid of this, just follow the procedure given here, and you’ll have a single Skype instance running throughout your system. http://community.skype.com/t5/Linux/Ubuntu-11-04-Unity-Launcher-and-Multiple-Instances-of-Skype/td-p/181856
1. Go to terminal and put this command to install dconf-tools
2. Press alt+f2 and run command dconf-editor. This will open the configuration editor.
3. Got to desktop > unity > panel
4. Double click on values array of systray-whitelist
5. Append ” ‘Skype’, ‘skype’ ” to the existing array
6. Logout from Ubuntu and login again.
Nice share!!!!
This will be helpful when working on a complex theme!
Specially a theme for video-site or e-commerce…
Pradeep is discussing. 
Rahul Bansal is discussing.
Gagan 5:54 pm on April 21, 2012 Permalink | Log in to Reply
Its not just search, it also accepts these arguments also, in case anyone might need someday :
‘author_email’ => ”,
‘ID’ => ”,
‘karma’ => ”,
‘number’ => ”,
‘offset’ => ”,
‘orderby’ => ”,
‘order’ => ‘DESC’,
‘parent’ => ”,
‘post_ID’ => ”,
‘post_id’ => 0,
‘post_author’ => ”,
‘post_name’ => ”,
‘post_parent’ => ”,
‘post_status’ => ”,
‘post_type’ => ”,
‘status’ => ”,
‘type’ => ”,
‘user_id’ => ”,
‘search’ => ”,
‘count’ => false
I’ve been deep studying these codes for the past three days(for implementing commenting from some other site in my project), so came across these facts