Hello
 
Viart should implement creation of custom landing pages. It is used for Ad Campaigns, for sending all the ad traffic to one or multiple landing pages.
 
You can read about landing page optimization and how it helps in the marketing of an ecommerce site
 
1). Landing Page Confusion—How Does Having More Than One Objective to a Page Affect its Performance?
 
http://www.marketingexperiments.com/improving-website-conversion/landing-page-confusion.html
 
 
 
2). Landing Page Optimization: Improving Conversion 50-60% by Applying Continuity and Congruence
 
http://www.marketingexperiments.com/improving-website-conversion/landing-page-continuity-congruence.html
 
 
 
3). Landing Page Optimization: How Businesses Achieve Breakthrough Conversion by Synchronizing Value Proposition and Page Design
 
http://www.marketingexperiments.com/improving-website-conversion/conversion-value-proposition-page-design.html
 
 
 
4). Landing Page: Finding Ideal Price Points
 
http://www.marketingexperiments.com/improving-website-conversion/finding-ideal-price-points.html
 
 
Magento has implemented landing page feature in thier cart and i strongly think that Viart should implement such a feature.
 
Here is magento's screencast of their landing page:
http://www.magentocommerce.com/media/screencasts/landing-pages/view

Could be good the custom page for the Landing page creation... But the Products blocks need to be accessable in the custom page custom layouts!

Yes, the custom landing page should operate just like a normal CMS page with all the dynamic attributes such as product page including the images, description etc.
 
The landing page would be best used when it would be used for A/B Split Tests or Multivariate Testing (Google Web Optimizer)
 
We should have the option of creating multiple landing pages with different template design for a single Product.
 
For e.g.
 
We want to test out the best landing page for "Product A".
 
We should create multiple pages each with its own template design so that the best landing page could be determined from the tests.
 
 
Here are the research on A/B Split tests:
 
1). A/B Split Testing — How to use A/B Split Testing to Increase Conversion Rates, Challenge Assumptions and Solve Problems
 
http://www.marketingexperiments.com/improving-website-conversion/ab-split-testing.html
 
 
 
 
2). Multivariable Testing — How testing multiple changes simultaneously can save you time, speed up your optimization schedule, and increase your profits.
 
http://www.marketingexperiments.com/improving-website-conversion/multivariable-testing.html

Yes, this could be an advanced ecommerce optimisation feature. The codeing maybe not as musch as we think...

Viart wont have to code the Multivariate feature as Google provides such service for FREE
 
http://.www.google.com/websiteoptimizer
 
 
They would have to implement Google Weboptimizer into Viart.
 
Here is the quick guide :
http://www.google.com/support/websiteoptimizer/bin/answer.py?answer=61149
 
 
And how to implement it in dynamic ecommerce websites:
http://adwords.google.com/support/bin/answer.py?answer=61201
 
 
 
The only feature Viart would have to add is the Landing Page feature would should support creation of Multiple pages for a one product of our choosing

By custom landing pages, Viart already has custom page ability. You can move items around via CMS, and you can create the content of the custom page.
 
I'm not sure AT ALL what this is doing that viart doesn't already do.

You cant add a specified product to a custom page. The standard blocks could used, but if You want to make a real landing page, You need to place one or just severeal products to this page...