MAMP 1.8.2 includes pecl but actually it doesn’t work. When trying to “pecl install mongo”, there will be an error.
grep: /Applications/MAMP/bin/php5/include/php/main/php.h: No such file or directory
So, I downloaded source tar ball of PHP 5.2.10 (same version as MAMP’s PHP) and configure && make && make install. Then $prefix/include directory will be created. Just copy them into /Application/MAMP/bin/php5/. It might be better to set prefix like this “./configure –prefix=/opt/apps/php-5.2.10″
Now pecl works well. You can get version 1.0.2 right now.
BTW, there is a link for a compiled .so file (http://osdir.com/ml/mongodb-user/2009-11/msg00463.html) but it’s old (1.0.0+) that means “$connection->database” syntax doesn’t work well.
Notice: Undefined property: Mongo::$database in /Users/nobu/Sites/mongo.php on line 4

One Comment
Just so you know, more recent binaries are available at http://github.com/mongodb/mongo-php-driver/downlo... (look for the .zips with "osx" in the name).
Being able to compile from source is nicer, though!