1. In Mobile Safari:
a. go to the page you wish to tweet about
b. tap in the Address bar to bring up keyboard
c. place cursor before the “http://”
d. type twit:// and tap blue button “Go”
2. Automate the process with a Safari Bookmarklet:
a. Tap the “+” icon in bottom toolbar to make new bookmark.
b. Tap “Add Bookmark” from the dialog that pops up.
c. Give it a decent title - eg “Twittelate This!”
d. Tap the blue Save button
note - you have to create a bookmark before you can edit it,
so that’s why you have to tap Save first!