The Motorola XOOM WiFi has received a quick maintenance update. Users are reporting that it brings with it the new Android market update that stylistically resembles the version for phones. Other than that, there are no other obvious changes (we’ll just assume the obligatory round of bug fixes are in here). HTK75D is the version you’re looking for. Go to Settings>About tablet>System updates to pull it down. [Pics Source, Thanks to everyone who sent this in!]
[Update]: The installable APK file for version 3.1.5 of the Android market (the update began appearing in phones last week) also includes the Honeycomb version, meaning if you have a Honeycomb tablet you can grab that file, install it and say hello to the new market. Most non-XOOM owners will want to do this. Grab this link and install it like you would any application. [Source]