Matt Chotin (the Flex SDK product manager at Adobe) just posted to say that http://www.adobe.com/cfusion/entitlement/index.cfm?e=flex3sdk has been updated for the new v3.4 SDK.

At last night's Flex 4 (aka Gumbo) Open Iteration Meeting Adobe announced that due to all the feedback from the community, they are going to push back the Flex 4 release date to 'early 2010' and also issue a further beta release later this year.

The Reactor ORM framework for ColdFusion recently gained a useful feature called 'filters'.

Filters stand midway between using the built in object-based query language and 'rolling your own' methods using CFQUERY.

In summary: very smooth, much better than 10.1 to 10.3 because I didn't try to do it on line, but with an upgrade DVD.
Minor problems with the graphics card driver and monitor but they were easy to fix.

Some niggles with things like DNS but again, it was just a case of redoing tweaks from 10.3 that had been undone by the upgrade.