Jirotrom said:
since I've now spent quite a bit on steam, I was wondering if there is
A) A way to get a receipt for all my purchases in case something goes wild
B) A way to receive discs for the games I have purchased for backup in case something goes wild
A) You get a receipt for each purchase, but such a thing is not really needed. If your account gets hacked/stolen, all you have to do is contact support and provide either a picture of a BOX with a Serial Key registered to your account OR describe your last purchases, along with credit card numbers (the last game i purchased was Street Fighter IV and the payment option used was Credit Card Billing and the last 4 numbers of the credit card are 1234), and they will get your account back to you farily quickly (in my case, it took them 2 days).
B) You can create backups from within the Steam application. You can select which games you want to make a backup of and the size of said backup (CD-R or DVD-R sized), and it'll split the files in said sizes.
But since STEAM is a decent service, you can always redownload, for free, your games, and you can easily retrieve your account if stolen, so, again, no real need for it.