DISQUS

1. Readability. This is mostly for the selection of fonts, sizes, colors, backgrounds, line and paragraphs spacing, and things like that.

2. Support for plenty of in-post formatting - images, nested quotes, bold, links, pre/code blocks and stuff like that.

3. Support for widgets and plugins out of the box. FlickrRSS, del.icio.us stuff, ShareThis, Google Adsense, Google Analytics, etc. The less I need to do and the more things work out of the box, the better. Famous "Cutline" theme has some nice implementations, including a custom.css support for easier upgrades.

4. SEO.

5. AJAX goodies - they look and feel so good, when done right... :)

That's about it...

Good job!

Two suggestions:

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Make the page selection a dropdown with available pages, not a textfield. Similar to the way the Page Parent is selected.

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Make the plugin work with posts too.

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With the above to points implemented, it'll be a killer plugin for all of us having (or thinking about having) blogs in multiple languages. :)

Additionally, I always keep confusing myself with single/plural forms. Should I mark tag this picture at Flickr as "car" or "cars", "sport" or "sports"? I keep thinking differently depending on the time of day. My del.icio.us tag cloud is full of things like "tag", "tags", and "tagging" ("feed", "feeds", "rss", "atom", "syndication", "aggregation")...

It would be nice to have links to the services that you describe. Googling them is easy, but clicking links on this page would have been much easier. Thanks for review. :)