On most pages in SharePoint 2010, the view selector drop down seems to have disappeared from the List View Web Part. This free tool re-instates it.
Before SharePoint 2010, a dropdown on the top right of a List View Web Part (LVWP) allowed you to select different views. This feature is not available in SharePoint 2010. On some pages, a substitute does exist in the Breadcrumb on the title bar (which is part of the Ribbon, at the top of the page). However, even the breadcrumb option disappears on the majority of pages. It disappears if you add another list view web part, add any other web part such as a Content Editor Web Part containing things like instructions for the list, add third party web parts, use your list on a wiki page. Also you don't get it if you've created a new page and added a list view web part to it. Once it's gone, you have to resort to the following moves to change a view. Select the list title (or something in the list) > List Tools > List, Current View dropdown > Then the view you want. Pentalogic has developed View Rescue to bring back the view selector drop down for List View Web Parts in SharePoint 2010, in the breadcrumb trail, in the majority of situations.
The tool is free to use and can be downloaded from their website.