Some of the other listed features are not unique to Perl
Few if any are. In fact, the three you say you'd miss the most aren't unique to Perl.
Perl is great because is has them all (and much more, of course) and because they are easy to use.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
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<sub> <sup> <table>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
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Want more info? How to link
or How to display code and escape characters
are good places to start.