This gives me a chance to make an acerbic remark (trying not to offend anyone).
So, <snip> iViewmediapro still has all the benefits it had, still has and will have if you don't need the benefits of Lightroom.
Michael has given some fair reasons for switching to Lightroom above and adequately fulfills his obligations as early adopter and sneezer - the question is when will the next NBT arrive ;-) and when will this particular curve plateau so that the rest of us can upgrade once when the genre is mature.
Hmmm....since you quoted me, I suppose I could take offense but won't. Not worth it. ;-)
I have been looking at DAM solutions for a few months but as yet have not made a final selection. I don't want to go through the upgrade or software change process with DAM software, since that is typically a painful process that carries with it very few benefits compared to the cost (mainly the time/effort of conversion and re-learning a new tool).
So I'm not looking to switch, but to choose the best package for my needs, at this (more or less) point in time. Since Lightroom is garnering raves from some photographers, like Michael, who's opinions I hold in high regard, it seemed prudent to find out what is so good about it, and why it might be better than ivmp (or others in the genre) before I spend my money, and even more importantly, invest the significant amount of time such a tool will require.
I will likely need a good cataloguing/keywording solution well before even the LR windows beta is released, so ivmp looks like a good contender to meet my needs. And worse case, if I decide to go that route, Lightroom (and other similar products like Aperture) are instilling a lot of interest and competition in the DAM space, which will cause all applications to improve (or die). This means that ivmp will only improve which is a nice position to be in.
My 2 cents worth in response to your "acerbic remark".
PS. After nearly 30 years in the software business, I'm a bit jaded myself.