These are the surveys that are currently open:

iLarn:

• iLarn 4-button-form ... [view results]
  What rearrangement (if any) should be made to the four-action popup in the version after 0.25.

any:

• Random hardware ... [view results]
  some hardware is more equal than others

Results of old surveys:

iRogue:
These surveys were to help determine future changes to iRogue.

• Saving [view results]
• Movement [view results]

kMoria:
Survey to determine whether/how to change kMoria.

• Button Bindings [view results]
  How people like to bind hardware buttons (Datebook, Address etc).

any:
General surveys to determine future changes to all games.

• Who Wants Color [view results]

You can also express your opinions at the WikiWiki.