Recommendations

[trickyblast]

Hi,
I would like to write a mod, where people enter information (from a drop down menu).  Then based on the information which the person entered it makes recommendations from other people who entered information in the database on who they might like etc. 

I run 1.1 RC2

Also I run a gaming site, so people would enter something like this
Top three maps
Honor
and then their name (wouldn't be a drop name menu)

Then say someone entered
Maps:
Bridge
Map 2
Map 3

Honor
17

Name
whatever

people who had a similar honor and map preferences would be displayed somewhere on the site.

Any idea?