not so much Viva users here? 

nvm.. i just found some great apps/hacks:

Slide to Unlock (S2U2)



Source: http://ac-s2.com/

really cool feature, like iphone sort, just slide to unlock. Slide to answer also available. Neat! Work like a charm on our HTC Touch Viva/Opal.
download the QVGA version for HTC Touch Viva

oh.. then you should also keep the 7yr sim card. antique   ...

i've played with viva few times.. there's more you can do with your viva you can even upgrde to WM6.5 but not official ROM.