I need some announcement function for the blog. Based on a quick search on wordpress, four came to my attention. I tested them, and finally Genki won!
Author: Lester 'GaMerZ' Chan
Modified from Adhesive by Owen Winkler.
All the information (general, changelog, installation, upgrade, usage) you need about this plugin can be found here: WP-Sticky Readme. It is the exact same readme.html is included in the zip package.
my comment: this one is not exactly the one I need. It keeps a post in the top, but not to display specific notes on the page.
You can set your message /news here.You visitors can now see your announcement. The Plugin is created with light window support. The animated effect on announcement will give a pleasant effect for your blog/website. It will be displayed only one time for a particular user . The plugin is created with cute design and animation. It will never interrupt your blog reader.
* Navigation: You can navigate your reader into a particular event
* Message Passing: You can announce any event information here
* Html content: You can add images, links, color just like a post (RTE).
For Example and Details Visit : http://www.sajithmr.com/wordpress-announcement-plugin/
My Technical Blog is : http://www.sajithmr.com/
AWSOM News Announcement
AWSOM News Announcement allows you to post news announcements in the area above your posts (or anywhere else you want) and edit it using the Visual Editor or code editor, all from the WordPress admin area. You can select who sees your posts (only non-registered people, or whatever level of registered user for your site) so you can keep certain things for only people who are members, or you can show ads only to non-registered visitors. You can now also run php code from the news area, so audio or video players can now be run without any other plugin. You can now add the news area to a post or page and also run php code there. You can set start and end dates for all news posts. The Plugin is now fully XHTML compliant. Part of the www.AWSOM.org series of WordPress Plugins developed by Harknell, webmaster of the Webcomic at www.onezumi.com
Author: Genkisan - i18n patched by Masayan
* easily switch on and off through Admin Options
* display message without editing theme files (above 1st post or through widget)
* display different message to different roles/users
* timer to switch on & off announcement (only in WP 2.1 and above)