I think this is better solution than the previous one I posted.

Attached is the modified "libflashplayer.so", in which I modified the "AND" (keyword for android) to "WIN".
This libflashplayer.so is based on the latest Adobe Flash from Market as of 6/26/2011.

Steps
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1) Uninstall the flash from the G tab
2) Install the latest flash from Market.

3) adb shell
4) su
5) cd /data/data/com.adobe.flashplayer/lib
6) mv libflashplayer.so libflashplayer.so.bak

Now unzip the attached file on your PC, after unzipping you will see file "libflashplayer.so".
Move the file to your /sdcard and then using "Root explorer" just copy this file from "/sdcard" to "/data/data/com.adobe.flsahplayer/lib/"
Then change the permission of this file to "755" (rwxr-xr-x).
Now just restart your G Tab and now Hulu should work without any issue (You should have dolphin or any other browser settings for plugins etc).
Attached Files
File Type: 7z libflashplayer.7z - [Click for QR Code] (3.10 MB, 859 views)