I have been looking for a white corner crib everywhere. My baby is due on March 1st and I really want this crib for her.

Well first , congratulations on the baby!  So you know it is a girl?  It is such fun to shop for a little girl isn't, I love looking for cute clothing and toys for my daughter!
I looked all over and found 1 place that carries the corner crib, and wouldn't you just know, it was sold out!  Have you considered a round crib?  It wouldn't quite go into the corner as close as the corner crib, but it still would save some room that a normal crib would take up!
The store A Baby has some really pretty round cribs to choose from! First I picked the Classic Round Finial crib, which sells for $835.00
Specifics are:

• 44"D x 76"H
  
• Crafted Of: Maple, Birch & Beech Wood
  
• Mattress Height Positions: 2
  
• Single Dropside
  
• Locking Casters
  
• Meets US Safety Standards
  
• Non-Toxic Finish
  
• Assembly Required
  
• Made In USA
  

Crib .com has a really pretty heart shaped crib, it is a bit an the high priced side, but if you put the corner of the heart at the corner of the room, you would have the same effect as the corner crib! The Heart crib sells for $1399!
specifics are:
Jeannie Kasem presents another first to the already booming baby industry! The new Baby Dear (tm) (heart-shaped) crib, is exclusively only from Little Miss Liberty! This canopy heart shaped crib stands for Jeannie Kasem's Little Miss Liberty design studio in every sense of the word! We pride ourselves in being the leader in design, quality and safety to the baby industry. This heart shaped crib becomes a soft serpentine shaped valentine, a message of love from parents to their baby

And there is another nice round crib with Net Kids Gear for $999.95!
specifics are:
A beautiful hand-carved and hand-painted round baby crib that is sure to be in your family for generations. Solid hardwood construction and quality craftsmanship are combined to bring you this nursery centerpiece, available in a variety of finishes and with your choice of finials.

Round baby crib has a single drop-side for easy access to baby Round baby crib dimensions: 48" in diameter Chosen finial will be set of four Mattress not included