I have seen well over a two dozen hacks and programs for Orkut, but in my honest opinion none of them are as user friendly as Scrapboy. Founded by Assaf Koren, Scrapboy's mission is to help you keep in touch with your friends within the Orkut universe.
Here is more from their feature page:
With Scrapboy you can send scraps from your desktop with the same convenience as writing an instant message. You no longer have to click your way through multiple pages in the OrkutTM website before writing a simple scrap, the next scrap you write is a mouse click away. [...]
Ever wondered why formatting your scraps with color and style is so complicated?
Well... it doesn't have to be. With Scrapboy adding color or making your text bold, italic or underlined is easy!
Although you can format and color your text with Orkut Cute and the Orkut Toolbar, what sets Scrapboy apart from either of them is the ability to be notified of not only new scraps from your scrapbook, but new ones from your friends as well!
You can download Scrapboy from their website, and be sure to join the Scrapboy forum within Orkut.
Note: If you are having any problems installing Scrapboy (like I did initially) you may need to visit your control panel and uninstall WinFX Runtime Components as well as all versions of .NET Framework . After doing those two things, simply reinstall Scrapboy on your machine.
(Hat Tip for fix: Microsoft Max Blog)
Update: Fixed some html within photo.
Update 2: Scaled down photo and listed Scrapboy underneath Orkut User Tools.
Update 3: Corrected Scrapboy forum link (I guess the other one was fake). Thanks for the note Assaf!