MAERIC  Freehand will be my app of choice till it's busted on whatever future OS makes it obsolete. While the new Illustrator CS4 is getting closer, it's still a bloated hog and I don't see full parity for another few versions. In the meantime I'm watching Vector apps like Drawberry and others to see how they evolve. The Independent vector app "race" is promising.  
(Version 0.7)

MAERIC  GOT 'NO TAG' ERRORS - WHAT'S UP?

This is the overall problem I am reading in others comments. I am using the demo mode and in the 10 song limit I found this to be true as well. I went to the website to see what's up before I buy this app and the problem is addressed clearly. Here's the answer/explanation:

iVolume is adjusting the tag named 'iTunNORM' that is embedded by iTunes directly into the tracks when 'Sound Check' is turned on. If the 'iTunNORM' tag is missing in a song, iVolume can't adjust that song. The result is a 'No Tag' error. If you get 'No Tag' errors in iVolume, first make sure that 'Sound Check' is turned on in 'iTunes > Preferences… > Playback'.

Sometimes you may still get 'No Tag' errors for many tracks. Especially older iTunes versions tend to store the 'iTunNORM' tag in its internal database instead of inside the track files.

In this case you can force iTunes to put the missing 'iTunNORM' tags into the songs by performing the following instructions:

http://www.mani.de/en/software/macosx/ivolume/faq.html#tag  
(Version 2.5.3)