Personally, I couldn't stand my white iPhone. It was so easy to get dirty. Thankfully, it was relatively easy to clean. I got it solely because my only concern was getting 16 GB, the highest capacity at the time. If they had it in black, I would've gotten that instead. When I ordered my iPhone a couple of days ago, I didn't give a second thought to when the white one was coming out.
You really can't compare a white glass phone to a white plastic phone. They're two different animals. If you're wanting to know what it's like to have the white iPhone 4, you'll have to wait for user reviews.