We just completed our four month project to convert over from Drupal->Ecommerce module to Ubercart, as well as an upgrade to Drupal 5.3.
The transition took a bit of work not only because of the age of the ubercart project, but because of the integration done to the ecommerce portion of the website.
To note:
Ubercart forums: the #1 thing ecommerce is missing is an active forum of many developers. When we found the ubercart website we were floored by the activity by the developers who've joined on to help Ryan and Lyle.
Created a EC-Ubercart conversion module. This allows all orders and transactions to easily get imported from one to another. However, now that we aren't going to be actively updating ecommerce or needing to import, I don't know how long this tool will be useful. You can grab it here: http://www.ubercart.org/forum/development/1636/ec_uc_import_products_and... (Works with Nov 1st Bazaar release of ubercart and Ecommerce 3)
Lots of testers! We had our sales manger go through and try all the cases she could think of. It made for lots of speed programing fixes this weekend
We're hoping to roll out some other site changes after this conversion is complete. Ubercart fixed many of the items we anxiously were waiting for from ecommerce -- and hopefully now with the conversion complete, we can work on other features for our customers!
Drupal nowadays has become the most important Content Management System product in Việt Nam, so it is only right that Drupal Việt Nam joins the Drupal world.
An update to my professional site. It's a relief to not have a boring site anymore. I upgraded from 4.7 to 5.3 and built a brand new theme. It was bluemarine at one time, but most of that is gone now :) Under the hood it's pretty straight-forward CCK and views stuff. Nothing fancy at this point. I'm happy with the CSS work for now.
I've tested it on IE 6-7, firefox, safari. Let me know how it looks on your end!