I am also in the process of collecting belgian beer bottles for the purpose of bottling. This has the nice side effect of having to consume some awesome beer to obtain the bottles (I know I can buy them but this way is more fun).
Northern Brewer sells the corks and hoods:
Luckily I already have this corker from my wine making adventure:
Double Lever corker
And they say this tool is helpful for tightening the hoods but not necessary:
Champagne Wire Tightener
Now I've only gone so far as to look for the equipment and the process, I haven't tried this yet but I've read the post on BYO here. It seems the process is the same as bottle in regular bottles, prime with the correct amount of sugar and the key is getting the cork depth set correctly. Can't wait to get enough bottles to try this!