You can remove all of that stuff with
Co0kie's Home Tab v1.7.1 cab. or you can just flick it up.... it will just make the clock smaller tho...
But after installing cookies tab hit the right softkey... on the home screen, it should say "menu" and select "edit Home layout" then press and hold on whatever you want to remove and select remove... you can go to 1:17 in
this video to see for yourself.
also if you prefer... you can just disable htc sense all together and gain a bunch of ram back... start>settings>today>items> uncheck HTC Sense.