Just finished a belgian wit. Tried a bottle today (1 week in primary, 2 weeks in secondary and about 3 weeks in the bottle). While I think I'll let it sit another couple of weeks/months before drinking it, it is pretty tasty.
That being said, I strained the orange peel out with the hops before racking into the primary. I can still taste the orange and corriander (though they are subtle). I think that next time I may use freash orange peel (zest) to get a slightly stronger and fresher orange flavor, but I'll still strain it out. I think it would be difficult to strain out the hops and corriander and not take the orange peel out too. I guess you could dry hop with ornage peel in the secondary to get a more intense orange flavor.
On a semi-related note, I will say that using belgian aromatic in a wit should probably be done sparingly. I put a half pound in my 5 gallon batch and it is very noticable. Very malty with a cream and vanilla flavor that almost overpowers the orange and corriander. It also added a few SRM to my beer which took it from a golden 7 to a coppery 12ish.