In search of: to-do/project/calendar tool

What I’m looking for probably doesn’t exist and is so totally tied to my “personal” workflow that I’ll never find it. I’m hoping that’s not the case but then again if it is, I should probably change my workflow.

There are a few things I’d like to be able to keep track of:

• Manage projects: I’ve got a bunch of threads going at one time (who doesn’t?). OpenID work, MyStrands projects, my garden, etc. I want a tool that will help me track time-lines for those projects, assign to-dos and manage overall targets/goals.
• Tight calendar interaction: I have lots of time and lots of different kinds of time. Maybe “downtime” at an airport or in the hotel. I’d like to get a list of ‘easy’ or ‘repetitive’ tasks fed to me so that I can just knock them out. I’d like to preserve my mornings for “thinking” stuff. As I’m working through projects and to-dos I’d like to have this all tightly integrated with my calendar.
• To-dos: Just a simple list of to-dos for a given day. Ideally these will percolate up from projects as well as give me a really easy way to add new things I need to do. This should also hook into the calendar function (for things that are date related).

On top of all of this, I’d like it to be web-based with the ability to integrate the calendar based events into Google Calendar.

In terms of other features I’d like the following:

• Web-based
• Integration with Google Calendar for date related items
• Ability to tag any item (as well as identify project tags, etc that can span to-dos, etc)
• Searchable (filed in the ‘duh’ category)

I’m not delusional … I don’t expect to get exactly this. However, I’d love to find something that is close. Right now I’m using Journler with pretty good results but its a desktop application (for the Mac even!) and I’m a little nervous about needing some info that won’t be accessible via the web when I need it. Yeah, I’m that important.

Anybody got any ideas?