Creamer's inaugural space-tweet will undoubtedly be remembered. Plenty of other Twitter firsts, however, are more easily forgotten -- and there may be a reason why.

Here's a look at the first tweets sent by some . As you'll see, most of them aren't exactly monumental.

(Note: Famous tweeter is not included in this list, mainly just because he . By my calculations, it'd take approximately 4,413 hours to sort through them all.)

• (Evan Williams, Twitter co-founder)