Nokia currently conducts a survey under the Nokia Developer Newsletter subscribers. The questionnaire is also available online. Go over to the Survey.
Although OPL isn't mentioned in the questionnaire, there's a text field where you can tell Nokia that you use OPL as programming language and why or why not you like OPL. Perhaps because it's free, easy to learn, available for three Symbian user interfaces, allows on device development or... ? You even might tell Nokia that you would be really happy if they would support OPL officially...
Martin