Tweply

So you don't miss that thing that was said to you just now and stuff.

If you tweet and want to see replies to things you post, but don't want all updates sent to your phone, or want real-time alerting, then this is the trick. Put in your twitter username, password, what you want to be alerted on and how you want to be alerted (your twitter username or an email address).

Important Note: Native SMS delivery has been disabled due to the cost. Please use the email address of your phone (example 4028675309@sprintOrAttOrSomething.com) or your Twitter username to get Direct Messages to your phone (If you have that configured through Twitter.) Login to "Manage your Tweplies" and delete your old ones, and then create new ones Thank you!

Other ideas? Be notified when someone, even a person you don't follow, mentions a #hashtag. Set Tweply to look at the public timeline and to watch for #whatever and see what comes in.
Want to know more? I have a page for that.

Create a new Tweply alert:
Username: Password:
What to watch for: @yourusername, #hashtag, obama, etc.
Phone number, email or username: Put your twitter username to use Direct Messages via Twitter.
Private or Public Timeline?
Recommend "Private" (or people you follow) unless you're looking to be alerted on things like #hashtags. Recommend email delivery for Public watches.

Manage your Tweply alerts:
Username:
Password:

(c)2009 @gabek/Gabe Kangas. Designed in vi using a keyboard by the web design firm of nobody.

Oh, and it's pronounced twee-plie (like reply - get it?). But I guess tweh-plee will do.