case - Find something with a 350 watt or more AMD approved power supply
motherboard - Find something with the features you want at a good price, (that nforce board you mentioned looks like a pretty good deal .. )
cpu - I have an AMD XP1800 ... and its been great for me .. I'd recommend it if the price is right
ram - Get at least 256MB of PC2100
hard drive - Personally I'd start off with a 120GB drive ... but if you dont waste space like i do Im sure you could make due with much less)
vidcard (If you get the Asus VM Nforce ... than dont get one of these ... else I like my Geforce 4 TI4200)
sound card (If you get the Asus VM Nforce ... than dont get one of these ... sometimes built in and not needed)
network card (If you get the Asus VM Nforce ... than dont get one of these ... sometimes built in and not needed)
also if you havent already ... be sure to check out newegg.com as they have geed prices and fast service.
also ... you way want to check out
www.compgeeks.com for some parts, they have cheap optical mice for like 8 to 15 bucks ... (i own a couple of them, and they are just as good as my MS mouse), they also have cheap keyboards there ... Its worth a look