Source: http://gizmodo.com/5887218/asus-transformer-bootloader-unlock-available-for-download
When the Asus Transformer Prime launched, there was outcry from developers over the fact that its bootloader was locked. Asus eventually crumbled, and announced that they would remove the restrictions. Now, almost two months later, you can download the fix.
The news means that those who wish to do so can now install customs ROMs on their Transformer. Asus is, however, keen to point out just how bad an idea it thinks that is, saying:
"It is strongly advised that you avoid activating this App unless you fully understand and accept the risks that may arise."
Yeah, yeah. Shut up, Asus. [Asus]