I'm sorry that this device is having issues connecting to WiFi. This is a great device and I was not able to find other issues related to this in my research for you. There was a recent software update that I would like you to install if not already to ensure this is fixed. Please go to Menu> Settings> Software Update to ensure the update is successfully downloaded and installed. If the issue persists after the software update, I recommend performing a hard reset (http://bit.ly/xCo3Hk) to correct. Please ensure to backup your contact, calendar, etc to Gmail before the reset.
Let me know that this resolves the WiFi concerns so I can assist if necessary.
Follow us on Twitter @VZWSupport