For a fairly comprehensive listing of the writing systems of the world click here. ScriptSource, developed and maintained by SIL International, provides a good deal of information on 137 writing systems in use today, including samples and links to fonts (where available).
The following sites have good information on writing systems:
On the internet it is easy to find expressions of concern about the undesirable consequences of text messaging, e.g. on the language and minds of users. This has been disputed by a number of linguists (see e.g. Crystal 2008, and his website on internet language). The Nuffield Foundation has a brief summary of a longitudinal study investigating whether grammatical violations in text messaging have detrimental effects on grammatical development and related literacy and language skills.
