I'm beginning my work with the IBM WebSphere website.
WebSphere main page:
WebSphere Application Server V8.0 Administration Curriculum:
Several courses are offered.
1 - Administration on Windows
2 - Administration on Linux
3 - Technical Overview
4 - Problem Determination
5 - Transition to V8
I think that this is a good place to start focusing. No budget to actually TAKE these courses, but this makes a fantastic outline.
The Certification page (http://www-01.ibm.com/software/websphere/education/certification/#free-was-cr) lists quite a few resources as well.
Available certifications include
"IBM Certified System Administrator - WebSphere Application Server Network Deployment V8.0"
The Recommended prerequisite section is telling:
Recommended Prerequisite Skills
There is an assessment test which I think will be a very, very useful tool, found here: http://www-03.ibm.com/certify/tests/sam317.shtml. Cost is $30 / practice test.
There is also a "Training Resources" section (http://www-03.ibm.com/certify/tests/edu317.shtml) that lists several redbooks and Web Resources.
There are about a bazillion web resources. Probably worth checking out.