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.
1) Uninstall the flash from the G tab
2) Install the latest flash from Market.
3) adb shell
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).