There is a kind of mobile version already, and you can enable it through your
profile in the
"edit profile" link, either as forced or by autodetection. This way I get a mobile version automatically if I look at the forum using a phone. This only happens quite rarely because it's not got the best UX, which in turn is probably because I use the low bandwidth version. That might be less necessary if using wifi rather than roaming.
Have you tried these settings yet, or browsed the forum in a desktop environment by way of comparison, ildruido?