Sorry to chime in here late.

Another thing we can do is implement prefixes. vBulletin has a feature that lets you optionally (or required to) select a Prefix when creating a thread. This prefix will then be appended to the thread title with brackets.

While you cannot search by Prefix, you can however scroll down the page of a forum category, and specify a filter based on a specific Prefix.

We can use a prefixes like:

• General
• Maemo 6
• Maemo 5
• OS2008
• OS2007
• etc...

The system also supports different sets of prefixes per forum if needed.