Let me give you some answers from the first hand:

Will Zemanta expand to incorporate other blogging platforms?
- Yes

Will they offer a more diverse range of suggestions other than Wikipedia?
- Yes (there are there already sometimes when you hover on a link suggestion)

How relevant are the suggestions?
- Try it out. We don’t claim to do magic, but we are trying hard to help bloggers. There are some misses, as everywhere.

Will Zemanta support other browsers?
- Yes

Hope that the answer’s wasn’t too short?
If you have any more questions, please send us an email or leave ideas, issues or just comments at http://www.getsatisfaction.com/ forums)

We value feedback from our users very much and would like to shape the future of this service together with them.

bye
andraz