hi all ,
I passed my websphere exam 158. Thanks for all those you posted information for this exam.
I strongly recommend the REDBOOKs from IBM for this exam. choice the redbook depending on the each topic.
Problem with redbooks there is no single red book which cover all topic. Since redbooks are free,
download redbooks related to websphere and read important topics. http://www.redbooks.ibm.com/
Remember this one is very tough exam, you need lot of time to prepare
Best of luck for all ...