All you haveSomething interesting called 'com.htc.flashliteplugin.apk' is located in the data/app folder for the sense rom. Also, this reappears in system/app as the programs 'flashliteplugin.apk' and 'flashplayer.apk'.
Also, it seems that some apps unique to the sense experience are in the app folder such as 'Dock.apk' and the htc photo/music widgets. It'd be awesome should someone port these over to the droid/nexus firmware if they don't already work with 2.0.1 and 2.1.
HTC Picture Frame Widget: Works
HTC Search Widget(looks cooler than the default one): Works
HTC Music Player: Not working with astro install, may need adb
Flash and Plugin: Installs but droid browser does not support the plugin, needs the HTC Browser possibly.
Here's all the apk's in a zip for the HTC rom, I believe this isn't illegal, however If a mod deems it to be I will take it down:
Just put em on your sd card and install w/ Astro.
If anyone can verify the flash support on the droid that would be awesome, i have very limied experience with android.