Absolutely fabulous!
At least, Joomla have way to remotely post, not login in to admin panel.
Save MUCH time!
Some problems - you cannot post directly to front page via xml-rpc and you cannot have "preview part of post and full post"...this make me sad...

Actually, i installed this component but not start using it.
Why? Just because it creates dependencies between your site and third-side.
Using this your rely on some another web-service
But, what if they going down? Will tour users able to register?
So, i prefer to use another solution - "Secure Registrations"
In this case you also have CAPTCHA images (maybe not so secure as in reCAPTCHA) and fully independent.

Component do just that it says - provide CAPTCHA security images.
Nothing less, nothing more.
Only one thing...maybe images should be me hard-to-read...
At this time they pretty simple.

I really like this component, especially abilities to create "favored by users" functionality...but, i think, comments module itself is not the best...JomComment have at least one HUGE advantage - AJAX
AJAX is pretty, is fast and easy to use
JomComment have it, mXcomment - not...

Works right out of box!
Moreover, it have internal Captcha library, so i still don't need to install monstrous Captcha engine - 1.5 mb is too much for generic shared library.

I tried BSQ sitestats first....and Joomlastats after
That can i say:
(+) Jstats have no dependencies on additional components ((-)BSQ need additional component installed first)
(+)Jstats seems to be faster (not slower site loading)
BSQ support creating charts using flash(+), but feature is really buggy(-), and in text mode BSQ summary really poor(-)
On other hand, Jstats provide only statistical tables with lot of information (+), bit sometimes this tables overloaded with unimportant data(-)
BSQ not really stable, then you have a LOT of data BSQ can really stop working or consume too much resources (-)
JStats have no problems with processing data, but it's tables grows really fast
Soo....
Bsq is more easy to use, but potentially troublemaker because tries to use advanced technics like Flash charts
Jstats more standart, but preferable on production sites
---
But i really missing flash charts...

Long time i use TinyMCE, but today it stop works (I use dev version of Firefox 3.0), my FF just says that code TinyMCE is contains errors...so t tried this redactor
And it works!
Faster!
Simplier!
Stable!
Good!

I just not understand. but Google not accept my sitemap link...
Invalid or unsupportable format, it says....

Really, i downloaded and installed this component, but...I don't see if is really working
Author says
"INSTALL simply copy paste the code below before your closing tag and change the parameters to match your openid values

"
But...that OpenID provider? External Provider? Then, if i still need to use external, official OpenID provider, For that purpose i need to use this useless component
This component is NOT OpenID server implementation and NOT OpenID consumer.
This component do nothing!

Rare and good idea.
Very nice extension. but there is some minor bugs still exists
(like mistakes in documentation; need additional patching from authors site)
Also need functionality to create categories in torrents database.
Torrents uploads and searching (due extra mambot) works fine.