Given the pending iPhone OS 3.0 announcement on Tuesday I spent a few minutes putting together my personal wish list:

• Universal inbox for email – this is the only thing that truly annoys me with the current design. I have both personal and corporate email on phone and have to constantly move between inboxes.
• Better support for enterprise wi-fi – I can’t connect to my corporate wi-fi network. This is even after I used the iPhone Configuration Utility.
• Better support for legacy VPNs – I can’t connect to my client’s VPN, their VPN hardware appears to be earlier then the iPhone supported version.
• Ability to click on phone numbers in calendar notifications – when I have conference calls its a constant pain that I can’t click on the conference call number from the calendar notification. I have to write it down then switch to the phone dialer.
• Better contact list performance for 1000’s of contacts – I have over 1000 contacts in my address book and performance, while not terrible, isn’t snappy either.
• Better handling of large (multi-megabyte) word and excel attachments – I regularly get emailed 2-3MB email attachments. The iPhone hangs on them. I would much prefer if it either refused to open them or displayed the first pages without hanging. PDF files don’t suffer the same problem.
• API support for background applications (notification api) – It would be fantastic if the phone allowed applications to register background routines for IM/Twitter/etc. type applications.
• Sync of to-do’s – the phone doesn’t support to-do synchronization at all yet. You need a third party application to get this.
• Voice dialing – I don’t miss this feature as much as I thought I would but I still feel it’s lack on a regular basis.
• Copy and paste – like voice dialing this isn’t that big of an issue for me, though there are times I miss it.
• Turn-by-turn gps – I don’t really expect this one but it would be wonderful if it happened.
• Video recording – I’ve seen video recording on jail broken iPhones and it doesn’t look very good. This one probably needs additional hardware support to work well.
• Ability to change bottom “fixed” icons – I would swap the iPod icon for the calendar icon in a heartbeat. Update: As Dustin pointed out, I completely missed this. It’s already in the iPhone. I smiled as soon as I tried it.