Well, lots to say here. I like the Cambridge ePortoflio for Ts a lot but still prefer to stick to my own blog as it gives me a sense of ownership, my baby sort of thing! I like the structure of the sample ones given to us for the task too, but I this can be mirrored in one's blog so no worries there.
I learnt that a blog can work as a wiki in the sense that an entry in my blog can have several postings under it in the form of comments which act a little like the links to new pages in the wikis. I alsmost started a wiki as my eportoflio, but realised that I've done quite a bit of work already in my blog and I really like it and enjoy coming back every now and then to add more and more resources.