Derek Buddemeyer uploaded a great preview for the upcoming Bias. Here he shows off the integration with Positive Grid's other app, JamUp. You can design your own amp in Bias and then a simple button press sends it into JamUp. You can then tweak it all you want, by bouncing back and forth between the apps.
I've been playing with Bias too, and have been quite inspired! I designed my own little Bias tone for analog synths, and have been using that same tone on synth apps through Audiobus! Everyone will get a chance to play with this soon, with a release date announced for November 13th.