I think you need to make sure that window has a decent lock/your bits are at least Kensingtoned down.
Oh, and paranoid safety tip aside - Sweet! (I'm assuming the 2 rigs are both used by the 1 chair, and it isn't for 2 people).
Yes both rigs are min i love having both and i use the imac when i am using compressor over the network so i have 10 processors it is insanely fast.
The window is in the backyard and i have 2 american staffies so i dont think anybody is going to come inside laugh.
Yes it is summer here I am in Melbourne Australia
To add pictures look for the attachments button it is called manage attachments. It is there when you post a message. You click on that and then select your images
Ikea sells a cable collector "basket" that bolts on underneath the desk. it's a pretty universal item you could make it work for any desk (that isn't glass). It's from their Galant series and it's great. You can throw a power-strip in there, and you'll only have wire leaving the basket... the rest exit out the side into your Mac.