[trouble]

"myusername has not listed his skills."

should be:

"myusername has not listed her skills."

or, more neutrally:

"myusername has not listed their skills."

Edit: I wrote this comment because I'm a woman and it can be a bit jarring to see myusername referred to as 'he'. I wasn't commenting on grammar; just trying to express my thought that if a website is going to refer to someone by gender, then it should be done neutrally unless the option to select a gender is provided.

[presto8]

or, more neutrally: "myusername has not listed their skills."

This is incorrect grammar (the subject and pronoun should agree)! Something like "myusername's skills have not been listed" would be ok.

[aphyr]

"Their" is totally a gender-neutral 3nd person singular now.

[sesqu]

Now? It's been a gender-neutral 3rd person singular for hundreds of years.

[cormullion]

More than you want to read about this:

http://languagelog.ldc.upenn.edu/nll/?cat=27

[jackowayed]

That's awkward passive voice. How about "myusername has not listed skills"?

[trouble]

What about "myusername has not listed any skills."?

[kaerast]

Or "myusername has no skills". That way you encourage people to add their skills.

[chrisaycock]

Shorter: "myusername has no listed skills."

[WingForward]

"myusername has listed no skills" sounds better to my ear.

[prawn]

Doesn't cater for users who only have one skill to list. ;)

[dctoedt]

Italicize his to signal that it's a variable. (That's how the Episcopal Book of Common Prayer does it, e.g., in baptismal prayers.)

[bluesnowmonkey]

His was a universal pronoun for almost 200 years until the women's lib movement of the 1960s. Know what? A lot of dumb things happened in the 1960s. It's 2010. Let's not spend our time arguing over pronouns.

[thomaspaine]

Easy to say when you're a guy. I think it'd be pretty weird if the default pronoun for my username was 'she' or 'her'.

[clr]

Please link your company & other projects in your profile so I and other tech women know we're not welcome in your efforts. Seriously. I'm done fighting sexists, I just want to know where you are so I can avoid you.

[lsc]

for this to work, really, we'd need another pronoun to mean "specifically male" as we have another pronoun to mean "specifically female" - "xhe" or something. Maybe then we could refer to "man" meaning human, "testicleman" meaning male, and "woman" meaning female, you know, both genders being prefixed by the reproductive organs that are specific to the gender, you know, to be fair.

Really, I think a more realistic solution is to just alternate between using 'he' and 'she' in your work; "they" grates on my ears when it's used in the singular, personally.

[moshezadka]

Just as an aside, there is a word for "specifically male man", it's "wereman" (just as "wifman", the old version of "woman" meant "specifically female man" -- "man" was short for "human", from "humanous" -- earthling, which both women and men are, despite martian/venutian assertions to the contrary...)

I learn all my etymology from Dinosaur Comics, http://www.qwantz.com/index.php?comic=551 :)