[Mooff]

untested:
In the bb-code manager add:
tag: blizzard
replacement

<div style="color:blue;margin:5px;border:1px solid black;">
Originaly posted by: {option} <br/>
<div style="color:blue;margin:5px;background:black;">
{param}
</div>
</div>

tagusage:

[blizzard="Some Dude"]
Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clit [/blizzard]

Not 100% sure if you can use url tags in the option-value. You need to test that one. If not, i made a post about a bb-code for gallery where some basic explanation is given how to use plugins for bb-codes.

Cheers