I've been working on quite a few things recently, mainly my downloads system, which is nearing v3.
In this version, among other things, I'm adding icons for select file formats.
A lot of file formats, to be honest, which gives me a ton of work.
Here are a few examples:

I know that the compressed file icon is pretty bad, and the image icon isn't great either, I've spent too much time on them to fix it.
So far, I've made icons for all of the following formats:
7z, aac, ace, ai, aiff, arc, arj, asf, asm, asp, atom, aud, avi, bat, bh, bik, bin, bmp, bz2, c, cab, cc, cgi, cif, cpp, css, csv, cue, daa, deb, divx, diz, dmg, doc, dot, dpf, dsk, dtd, dv, gif, gzip, h, ha, hpp, html, inc, ini, iso, j, jar, jav, java, jpg, js, jsp, lha, log, lua, m4a, m4p, m4v, mdf, midi, mov, mp3, mp4, mpg, nrg, ocx, odg, odp, ods, odt, ogg, ogm, pcx, pdf, php, phps, pkg, pl, png, ppt, ps, psd, py, qt, ram, rar, raw, rm, rpm, rss, rtf, sql, svg, swf, tga, tgz, tif, txt, uha, uif, vcd, wav, wma, wmv, xls, xml, and zip.
Phew, I've been working on these for nearly 2 hours straight.

Personally, I'm most proud of the CD icon, it looks really cool.