first of all many thanks to this site
. i am preparing for scjp 1.4. because
1) still now i am familiar with java 1.4 only
2) my company uses java 1.4 only( still we didnt switched to 'tiger')
3) lot of material and support available for scjp1.4 in the net(also books)
4) my thinking is that if we get the scjp 1.4 first, then we can upgrade our skills easily to java 1.5
5) finally, lot of projects are still in 1.4, and also lot more are starting with jdk1.4(i think it will take some time for 'Tiger' come into scene
also K&B is excellent.