You can get an idea on the status of the internet at the internet traffic report.
I have always used either Kaspersky or bitdefender as anti-virus solutions. Antivirus program reviews are available from anti-virus-software-review.toptenreviews.com which sounds like a really dodgy URL but actually looks pretty legit.
Microsoft Access forum called utter access.
Find out how to program a hash table.
Useful links for php and cgi scripts:
Excel help files
Just what is the system idle process
The codewalkers site is a good source for PHP and SQL help
General website advice can be found at thesitewizard.com
Java programming sites: JavaFAQ, Java Tutorials
Basic Perl script stuff CGI 101.
You can try and track back an IP address using a Reverse DNS (rDNS) service. An online rDNS can found at http://remote.12dt.com/rns/
PHP is great for writing web sites with. Unfortunately I don't have a clue how you would do that. However there are a lot of PHP projects at PEAR
If ever I have a question then I have usually found the answer on the HTML forums.
Using LaTeX typesetting for equations
Here is a quick howto with LaTeX (for my own use only as I keep forgetting the commands)
Compile the .tex file with "latex sample.tex" once compiled into a DVI (which can be checked) use "dvips sample.dvi" to compile into .ps format.
Then open the .ps file with Paint Shop Pro (use a resolution of 300 at least) or convert to PDF. Copy and paste selected equations out and save them as optimised GIFS (you my want to do without anti-aliasing).
You can now incorporate them into the web site.
Instructions on how to install the Simple Turing Machine v0.9.1 plugin for the Advanced Guestbook can be found here