And while we are talking about the O2 Mars - there seems to be another device in the pipeline - the "O2 Jupiter". The Jupiter is another brand new, so far unknown and unannounced Windows Mobile device but unlike the Mars, the Jupiter seems to be a Windows Mobile Smartphone.
The same user which has posted some blurry photos of the O2 Mars has also posted, over at MyPDACafe.com some blurry photos of the O2 Jupiter.
Unfortunately, he hasn't given any further information yet but the device itself as well as the comparison to other Windows Mobile devices looks interesting enough and with the front facing camera, it seems to be a UMTS device as well:

No word yet, where, when and if this device is released. Check MyPDACafe.com for more photos.

Cheers ~ Arne