I often use Mobile Safari and get half way through reading something and want to check it out on my real computer. It usually happens that I'm at a url with countless numbers and slashes that would make it really hard to retype. It usually isn't worth it.
Sure I could bookmark it, plug my phone in, sync then go to the site. But it's just too much effort. Also, I don't use Safari as my main browser and I use del.icio.us for all my bookmarks.
Enter bookmarklets, those little bits of javascript magic. Go to this
del.icio.us help page. Drag the
Post to del.icio.us button to your bookmark bar then sync your iPhone. After that to bookmark to del.icio.us you just have to go to the site you want to bookmark and press the bookmarks button at the bottom of the screen.
Then find your
Post to del.icio.us bookmarklet and press it.
Then enter in your tags and click save.
I'm going to make a tag called later for things that I don't want to keep but just want to read later. Then the bookmarks can be deleted.
This also seems to work with the
Share on Tumblr bookmarklet so I imagine it will work with a lot of others.