Export project to video in Background? is there a way to do this?

Question

export project to video in Background? is there a way to do this?
i.e. so whilst your project is exporting in the background, you could start up on another project for example

Answer 1

thanks Tom - what do you think re whether it's worth getting Compressor just for the benefit of contining working on editing the next project?  (i.e. noting you mentioned some performance issues) 
Still might be worth it for me being able to some some level of editing in the next project even if the responsiveness is a bit slower?
(assumption - I have only one macbook pro)
Model Name:
MacBook Pro
  Model Identifier:
MacBookPro6,2
  Processor Name:
Intel Core i7
  Processor Speed:
2.66 GHz
  Number of Processors:
1
  Total Number of Cores:
2
  L2 Cache (per Core):
256 KB
  L3 Cache:
4 MB
  Memory:
4 GB
  Processor Interconnect Speed:
4.8 GT/s