On http://lingua.mtsu.edu/chinese-computing/statistics/char/listchangyong.php, the 现代汉语常用字表 is provided in a format that should be easy to import into your database.
My suggestion: Make it available to Skritter users.

Ref. on Wikipedia: "In the People's Republic of China, which uses Simplified Chinese characters, the Xiàndài Hànyǔ Chángyòng Zìbiǎo (现代汉语常用字表; Chart of Common Characters of Modern Chinese) lists 2,500 common characters and 1,000 less-than-common characters." http://en.wikipedia.org/wiki/Chinese_character#Chinese

Make it available by all means, but I'd be wary of relying on *character* lists in any significant way. Run through the HSK lists and you'll get roughly the same number of characters and a ton of actually useful vocab.

I am confused, isn't the HSK represent gradually the most common characters in use too? how it is different from the above mentioned list

By all means, learn the "x" most common characters in the above mentioned list or another similar one but you won't get very far in reading or conversation without learning words which are character combinations, usually pairs. The HSK list and many other lists have both chars and words, useful stuff. This is one of the terrible secrets of learning Chinese: just learning characters isn't sufficient for practical use.

I'm aware of the fact that merely studying characters isn't enough. That's why I also run through the HSK lists, for instance.

However, I use Skritter primarily to study characters. Including this list would make sure that I haven't neglected any really important character.

That's fair enough, as long as you know what you're doing.

I already did it for MTSU's "informative text" list up to 2000.

http://lingua.mtsu.edu/chinese-computing/statistics/

See http://www.skritter.com/vocab/customlists/search?query=frequent

Kubus also did it for http://lingua.mtsu.edu/chinese-computing/statistics/char/list.php?Which=MO but broke them down into smaller chunks:

http://www.skritter.com/vocab/customlists/search?query=common

I agree that words are also important. You can use jochemb's excellent "Skritter word finder" program at http://huygens.functor.nl/skritter/wordlist to find words that already exist in Skritter's DB and that are made up of the characters you're studying.

James

Thanks for the links, James, very useful!

The tool on http://huygens.functor.nl/skritter/wordlist/ is very nice indeed.