With Mists of Pandaria the cooldowns for interrupts got longer. If there is another fight that requires an interrupt rotation (such as General Vejax, Omnotron, Reliquary of Souls, etc.) then three or four people may have to work in order to keep the boss interrupted.
Fortunately, KickAlert works the same. Before the fight, target the person you are supposed to follow with your interrupt. Right click on their portrait and choose the "Follow this person with kick" line. Then, during the fight, after they have used their interrupt, a "You are next!" will appear on your screen, and will stay there until you do your interrupt or the fight is over.
You can reposition where the message appears by typing /kal anc and sliding the box around the screen. Other options can be found by typing /kal or by looking on the interface->addons screen.
The option to set up a disarm rotation has been left in, even though it's been a long time since that was useful on a boss fight. Healers can also use it as a reminder for chaining big cooldowns, if needed, by using the "change spellset" button to show healer cooldowns.
There are a variety of options, type /kickalert or /kal for a list.
3.05 9/4/13 Change ToC for 5.4
3.04 5/23/13 Change ToC for 5.3
3.03 3/6/13 Change ToC for 5.2
3.02 11/28/12 Change TOC for 5.1
3.01 9/4/12 Fix for Blizzard GlyphUI issue
3.00 8/28/12 Update for MoP, add monks, remove old abilities, use 5.0.4 cooldown times.
2.01 3/2/11 Added rebuke, removed mage spell test icon
2.00 10/13/10 Change TOC for 4.0
1.97 9/30/10 Changes to make compatible with wow 4.0, except for final TOC change.
1.96 12/12/09 In addition to TOC bump, added a small delay between detecting the kick and setting the "you are next" message. This allows the target cast bar to update and disappear before the message shows up, in case of lag.
1.95 10/31/09 Catch additional case of clearing death messages after wipes.
1.93 9/16/09 Additional debugging lines.
1.92 9/9/09 Corrected error that caused an error message on the first new message after someone died.
1.91 9/4/09 Death message cleared on OOC. Changed default for rogues to also clear messages on OOC (note: will not change current setting). Added advanced options panel as a subpanel under options.
1.9 8/11/09 Added message for follow target dying. Will immediately put up a "name has died" warning, which is cleared on next kick/dismantle.