It depends on whose guidelines you use and whether bubs was full-term or not. I always kept my ebm in the fridge for up to 8 days with no problems (these are the more 'liberal' American guidelines) and milk in my freezer for 6 months....though I had to bin my freezer stash when he refused to take ebm. <span class="emoticon wink">wink</span>] This link
has milk storage guidelines, and they're the ones I used.
And in case anyone else needs them, these
are the guidelines for prem babies.
[Edited on 16/10/2009]