i just took my sol 8 admin exam 1 last week, now i am going over the material for exam 2 and i will take that next week.
(it helps if you have experiance since iv been doing this for 4 years i find i already have a good starting base so i can minimize the time i spend between tests)
check out unixed.com i have his solaris8 exam book and its pretty niCe. much better then the sun press material i read.