OK, I'm not an expert in all web technologies, and indeed there are some I have not even used before, but so far I have not encountered anything that I have been unable to pick up within a very short space of time.

For those of you who are genuinely interested, I have worked professionally with the following:

• HTML/XHTML
• JavaScript
• PHP
• Flash/ActionScript
• CSS
• MySQL
• Apache
• IIS 6.0
• Perl
• Smarty
• Unix scripting (Bash & tcsh)

...and no doubt some others that I've missed.