Hello to the Vegas Video 3 users!

I find that transitions are very limited.. I see people editing videos with all kinds of 3d transitions when they do photo montage.. is there a place i could get more transitions for VV3??? any cool plugins???? If you know what i'm asking please share your knowledge :)

Also does VV4 have more transitions? if yes more 3d or just regular 2d transitions???

Could someone please help me out here??

THANKS SO MUCH IN ADVANCE!!!
Have a very nice day everyone!