SamMobile are reporting that updates should be available for Samsung Tabs in July or August 2012. So now all I have to do is persuade Kies to connect to mine!
Samsung will start the Galaxy Tab Android 4.0 updates next month | SamMobile
Connecting to Kies
I have a Smasung Galaxy S2 phone which the solution I've written about before worked for but I also have a Samsung Galaxy Tab 10.1 running Android 3.2. It would connect via Kies wireless sometimes but nothing I tried would get it to connect via wired: it just said 'connecting' and never connects (I've left it for hours like that), or responds with 'Device not responding'. On a Windows 7 machine or a Mac with 10.5 and later OS. I can carry out file transfers and backups but not firmware updates via wireless connection.
I had read online about others with the same issue after a certain firmware update so I got stuff off it using MTP via the Windows machine and then did a factory reset (Settings, Privacy, Factory data reset). This took it back to a different Kernel Version (v18.104.22.168 dated 7th Dec 2011). Once I had done that it would connect to Kies on Windows, but still refuses to on a Mac. To overcome this I installed VMware and a virtual Windows machine on my Mac (more about that here), then, using the inbuilt VMware USB connection settings I connected the tab to the VM.
Once I finally got it to connect to Kies but it then said it had the latest firmware... enough to make me want to smash the tablet!