Use good quality Indian coriander and don't crush it too much. I used 1oz of Coriander in my wit, but I crushed it with a mortar and pestle. You don't want to pulverize it.
This page claims that the Hoegaarden is bottle conditioned with the primary strain.
That said, whenever possible I use White Labs or Wyeast and then wash the primary cake. Splitting the saved yeast across four jars brings the per-batch cost down to less than dry yeast. There is nothing wrong with culturing your own yeast as long as you are psychotic about sanitation and you slowly step the starter up 3-4x all the way up to 2L.
different yeasts work different ways. wit yeasts don't work quite as fast as hefeweizen yeast IME, for example. and if you aren't using a secondary, you should always leave in the primary longer.
i've had beer go from grain to glass in just 5 days, but it takes a big starter, arousal of the yeast, finings and/or filtering, and special care through the whole process.
trust me, your beer will be better if you let it wait a little longer. no sense in risking mucky beer just to save a few days time. and if it's not finished fermenting completely, you could stall fermentation and leave it sweet. not worth it IMO.
what about rolled oats in a wit recipe? anyone add them for some mouthfeel? heard it on the jamil show but they never gave an amount or a percentage. how much for a 5 gallon batch? oh and is 62*F too cold for wlp400?