According to iClarified, Apple has released the first update for OS X Lion developer preview in Software Update.

The changelog indeed suggests this is only an update aimed at allowing developers to download new builds from Mac App Store in the future:

�This update is required to redeem downloads of Mac OS X Lion seed builds from the Mac App Store.

Apple might prepping to release the second preview of the upcoming operating system to developers. A recent report said that Apple is gearing up to deploy an OS X Lion update to developers that they may be classifying as the “GM1” release.
We will update you as if any update come in. Stay tuned

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