A sad, sad day. The much-maligned <blink> tag is being removed from the last browser that supported it, Firefox.
Thankfully, we can easily come up with an even more annoying alternative, our own special programmatic "blink" that has adjustable speed and alternating blinkage.
First, apply a "class" attribute to whatever you want to blink:
<div class='blink'><p>PUT ANNOYING BLINKY STUFF HERE</p></div>
You can use tags other than <div> -- <span> is a good choice too. Note that more than one item can have the same "class" so you can do that multiple times. In fact you should, because that way they'll alternate states and be extra annoying.
Now, add just a tiny bit of code:
Oh yeah, that's the stuff. The blink is dead, long live the
UPDATE: I fixxorated it so it'll work (hopefully) with a new-ish version of Internet Exploder too. Woudln't want bbkf and Mooser to miss out.