I HAD mobile me... it was NOT worth the one year I had it. The things I needed it for like push email was replaced by google's services, and same thing with find my iphone, which apple let's you have for free now.
Now I use google's push email, to sync and retrieve my email. I use google calendar to sync my pocket informant app (ok the iphone's calendar is RUBBISH!!!!!). The pocketinformant app was worth the 9.99 I spent 2 yrs ago

. For notes, I use evernote since it syncs my notes on my computer, iphones, ipad with my evernote account. Evernote is 150% better than the notes app since i can load pdfs, pictures, in addition to notes. For example, I can "scan" a document by taking a picture, load it on evernote, then tag it for archiving purposes. Then it sync automatically. The notes app on the iphone can't touch evernote. I have pdfs, notes, etc... for car maintanance related stuff, school documents, etc.. or evernote that I can use the search function to retrieve.
I don't have a solution for syncing bookmarks over the air, but its not a big deal since I use the chrome browser anyway.
Oops... i forgot to add. I also use the contacts app on my gmail. Once you set up google push notifications on the mail app, you can sync your contacts as well. SO if add a contact to my phone, it'll sync it to google online, then when I open my computer, it syncs the contacts on my Air. And Vice versa if I add a contact on my MBA and it'll end up on my phone
God I feel like a google ad LOL but it really is a valuable free services.