Here is a quick walk through of MeeGo UI demoed on ExoPC Tablet. Many of what you see in the demo may not reflect what the final shipping product will look like due to the fact that is a pre-alpha version.
According to MeeGo Expert, unlike most tablet manufacturers it does not have a wall of icons or widgets, alternatively it has a series of Panes instead. Each Panes can be assigned a particular category such as Photos / Video / Music even Twitter etc.
As a whole the interface is quite smooth and responsive but obviously not on par with other Tablets such as Apple or Blackberry due to its early development stage.
Watch out the demo video below and see how smooth and responsive the whole interface is. Enjoy!