At a mere 1.08MB, the download adds five holiday-themed stages and ten challenges to the unicorn-starring game. The new levels can be played in either Quick Play or Duel. nope
The download is compatible with all versions of Peggle Nights, including the Steam release. The pack even works with the demo, though not all stages are accessible.
"We can't get enough of Peggle ourselves, so there's a selfish motive behind introducing additional levels for Peggle Nights on a frequent basis," said Peggle co-creator and PopCap studio director Sukhbir Sidhu.
More level packs will hit next year, though they may not be as cheap--PopCap noted that the holiday level pack is a $3.95 value, but is "free for the holiday season."
It's a limited time free offer. Not worth it to do an automatic update. Also required to hear about it on Shacknews so...
March 3! http://www.shacknews.com/onearticle.x/55545