Same here !!!!
Start up Lion. go to "NetworkPrefPane/Wi-Fi/Advanced/WINS" settings are all "blank". Re-enter NetBios name & Workgroup. Works for hours even through "Sleep".
[Restart] I have to go through the entire process all over again. Computer name set in the Sharing Pref Pane does not change.
Steps taken to resolve. "That don't work."
1. Created a new /Library/Preferences/SystemConfiguration/"preference.plist" by renaming current to .bak, to force a new preference.plist to be created after start up. Same done for the com.apple.smb.server.plist in the same location.
2. Deleted the Network Interface "Wi-Fi" and started from scratch.
3. Changed the computer name. Several different names used.
4. Toggled On/Off SMB sharing in Sharing Pref Pane. Same with Share over AFP.
5. Locked the Network Pref Pane. After [Restart] Network Pref Pane is unlocked "not asked for admin password". Every other lockable Pref Pane remains locked.
6. Cleared all caches, ran all crons scripts, repaired permissions, and zapped the PRAM.
7. Changed Network name. Several different names used.
8. Toggled Back to my Mac On/Off.
9. Toggled Firewall is On/Off.
10. Toggled all sharing services On/Off.
Tried all the above several dozens of times in different sequences. This has been a 12 hr. trouble shoot so far, after upgrading to Lion 10.7.
Any other suggestions ???
Really like Lion, and don't want to give up yet.......