Is pyunit still usable?

[could ildg]

I want to know something about unittest these days,
and since I'm learning python, I want to touch it through
python. But when I found the newest pyunit is even so
old, I wonder if it is still usable for current python version
2.4. Will you please tell me? Thank you.

What are the advantages and disadvantages of unittest?
Can somebody give me a detailed listing?