If you lern some php and a bit about vB you could easyly do it. Mine (currently testing on localhost) is set up to run in certain forums, in these forum when someone makes a new thread/replys they have options avaible to them that controls how the bot replys. And a default on/off switch in their user cps to have the option "Allow bot to reply?".
Then, asuming all options are checked on, the bot will
- Search google for results of query
- Seach the board for the query
- Reply to post (before the user is even returned to their post
)
All this was done with just two custom scripts (small), and a few files edits/database modification.