Quite a lot for UBB5, although UBB6 is a little new and so SSI tends to come later in hack development etc.
However, Whose Online and Active Topics can output via SSI, yet Active Topics is probably the best one to note.
One word of advise, it's probably better to off-load information in a pre-formatted basic HTML or .txt file for the stats - this keeps processing usage down. Of course it's up to you, it's just that SSI denotes flexibility and calling such data directly can cause conflicts with other formats and yadda yadda… I'm off to drink beer.
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