Root No MAC address after root :(

[surf_r_dude]

So my xperia x10 got stolen and I decided to go for the Galaxy S, and I'm loving it like 10 times more so far! Except the only problem is when I bought the phone it was already rooted, which I was fine with because I probably would have ended up rooting it myself. Except the only problem is my wifi has a Mac Address filter, and when I go into to the settings of my phone under Wi-fi mac address it says unavailable... so I was wondering if there was some way to figure it out through some other means? Like possibly an app of some sorts? Or maybe there's a fix for the ROM I'm using. It's running:

CriskeloRom V65

Any help would be appreciated!