Is this a SEO plugin.I need one

you can start to consider it SEO , if you consider that google likes pages loading faster.

some more will come out in next versions, waiting elgg 1.8 that seems to be a little more faster than elgg 1.7

did you try it with htaccess? do you see some difference in loading time on your site?

SO I have to add this script to the .htaccess file in elgg package

yes you can paste in the root of your elgg site the htaccess of this plugin. it will overwrite the previous one.

Having some trouble implementing this, After replacing the .htaccess file with the one provided I get a server error 500. I have managed to narrow it down to this section of your .htaccess file, if I remove this tidbit everything functions normally.

Header unset Pragma

# Turn off the ETags
Header unset ETag
FileETag None

# Turn off the Last Modified header except for html docs
<FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css)$">
Header unset Last-Modified
</FilesMatch>

# Turn on expiry
<IfModule mod_expires.c>
    Header set Cache-Control "public"
    ExpiresActive on
    ExpiresDefault "access plus 10 years"
</IfModule>

# 2 HOURS html
<FilesMatch "\.(html|htm|xml|txt|xsl)$">
Header set Cache-Control "max-age=7200, must-revalidate"
</FilesMatch>

Any thoughts

No veo la diferencia en la velocidad

I enabled this and the birthdate picker in the profile_manager plugin would not show the calendar that allows you to choose your birthdate when a useres fills out their profile info.

@for all, i'm thinking to rewrite this plugin so for now don't use it.... it will be ready for elgg 1.8

may i know when will this be ready for 1.8 version

waiting for 1.8.3 ....