You can launch your ventrilo via nohup and keep it running even if you logout.
Also you can use screen to do the same... and detach from your session and reatach...
Or you can start your process do a ctrl + z and then send to background with bg, also starting your process with yourprocess & do the same trick (but you lose all output), beter use it with nohup.
info is your friend info nohup, info screen.
use VIC3M for a 70USD discount on all plans (except monthly payments) +10% on storage and bandwith.