I haven't tried this yet.. Was hoping someone here has used it or at least will try it out first and let us know how it works. I'm too poor to brick my phone. ;)
Code
http://www.jgui.net/a.sms/index.html
Also, if you know of any other replacements for sms, and I mean "replacement" like I will never have to see the WM sms interface agian, let me know please!