Welcome to 1.0! There aren't any huge changes, but we've been API stable for quite some time, so let's do it. No reason we have to wait on Feeds.
The major change is #1647802: Plugin: Entity Field Query finder. That thing is awesome. Check it out.
Changes since 7.x-1.0-beta5:
7.x-1.0-beta3: Bug fix: Add $ub = 'Unknown' by default
This release fixes a bug in the update from 7.x-1.0-alpha1 to 7.x-1.0-alpha2. It also fixes a bug when reverting exported queues.
Fixes problem where teaser sometimes generates errors. Requires minimum of Writeup 2.51
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