Everithing is in the topic..
It's what i have read on this website : http://webdesign.about.com/od/htmltags/p/blatmaxlength.htm
What do you thing about that ?
This table made by the zealous Web Standards Project member is quite handy for such questions: http://keryx.se/resources/html-elements/
No, it's not deprecated. The page says:
Deprecated in XHTML 1.0
The bit that says 'Deprecated...' is a heading ;)