Process Explorer, IMHO the best task manager for Windows has been updated to v11.0. It now offers even more information than before. On Vista you now can see the I/O and memory priority^*) of a process and if the executable has Address Space Layout Randomization enabled. And the TCP/IP Port display in the process properties is working now on Windows Vista, too. I especially missed that feature after switching from XP to Vista.

^*)On Windows Vista I/O and memory access can have different priority, too. For example the search indexer (searchprotocolhost.exe, searchfilterhost.exe) use lower i/o and memory priorities to not disturb you. There's a great three-part article series in Technet Magazine explaining the various Vista changes.