Adding new blocks

[conaero]

Hi, I have just installed Everywhere sidebar, and it great.

My question is, how to I get more blocks?

When I add one, I have a drop down list and it gives me 4 or 5 stock blocks, like Tag Cloud, most recent threads etc.

I want to add a highest posters league table, or most posts this week, but it not in the list.

Do I download and add these types of blocks from somewhere or am I stuck with the stock ones only.

Cheers in advance.

Matt