Hai,
Last month I cleared 486.
I prepared for 1 month 5 hrs per day.
I studied following:
1)UML Distiller 2nd edition - fowler
2)UML and Patterns 3rd Edition - Larman
3)Bala's Guide:
http://guide.zepho.com/version1/ You must read Bala's above mentioned guide, without this I could not have cleared the exam.
MZ's 3 quizes are very much helpful.
You just go thru the forums and resources of the following link:
http://objectsbydesign.com/tools/certification.html#resources I strongly believe that this exam is 100% worth, eventhough it is going to be discontinued.
All the best.
siva.