The first thing I’d do is NOT link to a website that has been hacked, and is therefore likely to be carrying a trojan.
Just like the other one from earlier this week.
EDIT – I reported your post, just in case.
Utter tosh! and not very helpful.
Your site is still there hjust your index page has been changed, looks like only text but worth digging a bit deeper.
The possible entry points will be
CMS / admin
Your BB board
Hacked FTP (less likely though)
FTP to your site and check the folders and make sure no new files are up ther. You don’t want scripts running on your hosting in the back ground. If you can take a backup and delete everything. Don’t forget to back up your DB.
Ask your hosting comany for the FTP logs and rule this one out.
Next look at what CMS you are using / Is it open source if so patch it up.
Then look at the forum software (this is your most likely suspect and agin if this was the problem change it patch it)
Thanks
Cornelius Reginald Xavier III