OSX 10.10.1 now available

The OS X 10.10.1 update is recommended for all Yosemite users. It improves the stability and compatibility of your Mac. This update: 
- Improves Wi-Fi reliability 
- Improves reliability when connecting to a Microsoft Exchange Server 
- Improves reliability sending Mail messages when using certain email service providers 
- Improves reliability when connecting to remote computers using Back to My Mac.

So there's your Wi-Fi fix.