This afternoon I finally finished Burda 05-2009-123! It fits good, though if I were to make this again I would probably lower the empire line by 1/4" or so.
Chiffon is definitely NOT my favourite fabric to work with. My serger didn't particularly like the fabric either as it tended to shred along the edges as I was serging. I guess I could have done French seams to finish the edges, oh well.
I tacked stitched the ruffle edges together at the V-neck to prevent the neckline from gaping, it's actually really secure.
Overall I'm pretty happy with this dress. I doubt I would make this pattern again unless perhaps I fell in love with a lightweight shear fabric, lol.