Apparently slush's pool no longer supports merged mining according to "fourd00rgtz"?

See this post: https://bitcointalk.org/index.php?topic=1976.msg1764838#msg1764838

Try this pool for stratum based merged mining: http://mmpool.bitparking.com/pool

At namecoin's current difficulty level (seen here: http://dot-bit.org/tools/nextDifficulty.php ) it is going to be a long time until you mine a namecoin block going it alone unless you have an ASIC handy.