Further solidifying my title as “Workaround Sue” – Just copy one of these and paste it into your tweet. Here you go: ♥ ♡ ♪ ☺ ☹ ☮ ★ ❦ Quick ‘n dirty.
Even better, here’s a long list with tons of symbols. A sampling: ♘ € ☯ ☂ ☀ ☛ ✓ ☢ ♀ ℞ ☎ ¢ ↑ ↓ anyone?
(This dodge also works when you are trying to watermark an image in Photoshop and you’ve whacked every key on the board trying to find the dang © symbol.)
Of course, this is only if you want to tweet symbols once in a while. If you want to fill all your tweets with diamonds and yin-and-yang symbols and ivy leaves and stuff, you’ll probably want a real solution like enabling the Character Palette on a Mac or adding a TwitterKeys link to your browser toolbar.
(P.S. Hooray for people who write up helpful how-tos like those posts out of the goodness of their hearts. That’s how I learned these are called Unicode characters. I found all this in a mad session of Googling after the whim struck me to tweet a heart… indeed, I do ♥ humans.)