[jQueryIsAwesome]

get out, get in, get in shape, get laid, get up, get down, get http://example.com/file.zip

It really is poor engineering, any non-letter prefix would have been good enough.

[libria]

Well there aren't many convenient choices on a phone. # is used in twitter, * is often used by the carrier. Might have been better to prefix with just "z".

[scoot]

Twitter existed before the hash-tag - that was a user created meme: http://support.twitter.com/articles/49309-what-are-hashtags-...

[treetrouble]

disabling the use of #get as a hashtag is still better than disabling its use as an english word