ml> i hear ya! i'm looking not only at doing the
 ml> humidity but also temp and wind dorection and

This is a good place to start looking for a component that you can use to
build your own humidity sensor.

http://www.honeywell.com/sensing/prodinfo/humiditymoisture/.

The cheapest turn-key device I can think of is the following:

Buy two Go!Temp temperature probes from Vernier and plug them into two USB
ports. Cost: $58.

Alternatively, you could use a Go!Link interface and the humidity sensor. 
Cost: $126.

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