I have exactly the same problem with Belkin N+ and iPad. It works fine when on-line, but when iPad wakes up, the WiFI connection is still there (in WiFi setting), but not working. I have always switch off WiFi, then switch it back on and then it is working fine until next sleep. I do not know if the issue is on iPad or Belkin side, but I really would appreciate if anyone could help me how avoid this issue.
clrk9000: what is your config when it is working fine for you since NOV 29? I tried to change the settings on both Belkin and iPad but still having the same problem.