I am planning to do the SCJP soon (in the next month), and am thinking about whether to do the SCWCD exam next.
You'd better focus on SCJP first. You'll have plenty of time to ask for this when you've passed
What i really want to know is how much time/effort does it take to pass it compared to the SCJP?
There's a lot to remember (tags and API). But questions are not as tricky as SCJP. I think it's easier but there's still work to do.
But i dont think i want to commit myself to such a heavy workload again for awhile
If you're interested in it, you can still give it a quick read, and decide to go for it or not.
I have a good knowledge of web apps (jsp,servlet,tag libs etc) as well design patterns .
That's a plus. But don't take it for granted
Good luck.