Well having recently seen this post I too have downloaded WirelessMail in the hope that it can handle appointment/calender invites, which it appears I cannot do with BIS and Lotus Notes.

My first issues were that I did have not complete access rights to the lotus scripts so the install reverted to intalling the Lite version. But then I have had patchy success in having emails forwarded to the BB.

So I am reverting back to a simple forward rule of all email to the BIS. I do like the sound of what WirelessMail is doing, its not too intrusive for your corp email admin people and some of the additional features sound great. I will prehaps try again when my email admin people can boost my Lotus Script rights to allow the full version.