Sohail - you absolutely nailed it. I was an original Mac user, got forced by my institution to go towards Windows, finally spat the dummy last year and returned to Mac. I also bought iPad early in its life. Having been a long-time user of Outlook and wanting to keep using it for various reasons, I too am totally frustrated by both the Mac version and the iPad Calendar in terms of business applications.
Apple, I'll avoid SHOUTING (even though I have been so frustrated for so long on this) but please, please fix this - I do not want to carry paper around, and the various "fixes" of downloading and re-emailing documents to oneself or keeping a separate file of meeting documents, etc are hopeless.
Please do not suggest that I switch to Calendar and Mail - I have looked at these several times, believe me, and if they worked for me I would use them in a flash. Outlook works just how I want it to on a Windows machine (ridiculous as it seems, I was running Parallels for a year solely to use the Windows version of Outlook - really clunky and stupid and doesn't work for iPad).
I am a busy person, with lots of meetings and I need the attachment capability that Outlook has in Windows but on my Mac and iPad.