This can easily be done. Load Desktop Manager on your company PC then go to Synchronize > then on the left navigation bar (under Configuration) select Synchronization > then Synchronization button > check Calendar > and finally it should have an option to synch with Lotus Notes
The only concern I have is that I work for a financial company that is VERY protective of information security.
I wouldn't be able to load the Desktop Manager software on the PC, nor can I connect my BB to the company PC. The best I could do is email myself a file to upload.