@ashford: Converting from D6 to D7 is tricky, period. Many of these modules probably don't have an upgrade path yet, but you'll just have to look on a case by case basis. The few times i've "upgraded" from D6 to D7 I simply started fresh with D7 and migrated the content over after the D7 site was finished. There are issues with doing it that way, but there are issues doing a true upgrade too. Maybe this would be a good topic for another blog post.