From XDA, here are the changelogs from the two updates. The first one was pretty significant:
26th April 2011 ('Update 2' screenshot):
-Build number: HRI66.WW_epad-8.2.3.9-20110423
-Kernel changed.
-Updated Wifi driver.
-Updated bluetooth driver.
-Fixed video camera stutter. ('Youtube' mode = 720p@30fps and 'High Quality' mode = 720p@27fps)
-Fixed 'speaker always on' issue.
-Minor bug fixes.
19th April 2011 ('Update 1' screenshot):
-Build number: HRI66.WW_epad-8.2.3.6-20110414
-Kernel changed.
-Updated Wifi driver.
-MyNet now in English not Spanish.
-@Vibe app moved to MyCloud.
-My Cloud has been added. Adds MyContent, Mydesktop, @Vibe. (requires a download from Asus site)
-Asus Web Storage added (windows version).
-Adds Splashtop Remote desktop for free. (
Splashtop Remote desktop for the iPad, iPhone, and iPod touch.) Works pretty fast via wifi, and just mirrors your desktop, as if you were using hdmi. Change the option from 1024x768 to 1280x800 for proper operation.
-Generally things feel a bit snappier.
-New MyZine widgets. (adds a slideshow of your pics, shows calendar daily notifications and weather in your location. Also shows last visited bookmark and last played song, email unread count, event count, stored ebooks counter)
-Green camera issue fixed.
-Asus Web Storage option added to sharing options menu.
-Added independant alarm ringer volume bar to settings.
-Added option to make any photo a contact photo from gallery.
-Market MyApps icons loading faster.
-Added Layar app.
-Compass fixed.
-Asus E-mail widget now shows an 'all accounts unread mail' total.