I haven't posted in this thread in a while, so I thought I'd upload a selection of awesome EPs from various genres...
65daysofstatic - "The Distant and Mechanized Glow of Eastern European Dance Parties E.P." (2008)

http://www.mediaf!re.com/?bmq531zmimh
A short, but interesting (especially considering use of vocals, a rarity for these guys) remix E.P. from these UK post-rock/electronica fellas.
Against Me! - "The Disco Before the Breakdown E.P." (2002)

http://www.mediaf!re.com/?djonwnrwmwi
An early E.P., and the first output from the band following their acclaimed "Reinventing Axl Rose" album. Very different to the stuff they're doing now, it's a raw and passionate blend of folk and punk. Regardless of whether or not you like their most recent stuff, this is definitely worth checking out.
Daredevils - "Hate You E.P." (1996)

http://www.mediaf!re.com/?jmzmjczy5jw
Shortly after leaving Bad Religion in the mid-nineties, Brett Gurewitz assembled a supergroup of sorts, consisting of himself on guitar and vocals, Gore Verbinski (the film director) on guitar, Dean Opseth on bass, and "drum slut to the stars" Josh Freese. Sadly, this is their only recorded output, but they're two solid tracks of melodic pop/rock/punk.
Frankie Stubbs - "Frankie Stubbs E.P." (2001)

http://www.mediaf!re.com/?z5dnnmyki0e
A stripped down recording featuring just voice, piano, and acoustic guitar from Frankie Stubbs, vocalist and guitarist for northern UK post-hardcore/punk heroes Leatherface. This is a beautiful but rather depressing recording, with Frankie wrapping his smoke-blasted vocals around three originals, an Elvis cover ("I Can't Help Falling In Love"), a Nick Cave cover ("The Ship Song") and a re-working of Leatherface's "Dead Industrial Atmosphere."
Fugazi - "Furniture E.P." (2001)

http://www.mediaf!re.com/?jwd4mnwxmmq
Three tracks which "didn't quite fit" on their final LP "The Argument," these are raucous blasts of post-hardcore that harken back to the band's earliest recordings. An Ian-sung number, a Guy-led track, and an instrumental. Short, sharp, and fucking awesome.
None More Black - "Loud About Loathing E.P." (2004)

http://www.mediaf!re.com/?enxynmmwdfi
Unbelievably catchy and melodic punk rock with a gruff, unpolished edge, featuring ex-members of Paint It Black and Kid Dynamite, "Loud About Loathing" is six tracks of pure, unadulterated, uplifting bounciness. "Oh, There's Legwork" has to be up there with the best pop-punk songs of all time.
Piglet - "Lava Land E.P." (2005)

http://www.mediaf!re.com/?yzzbymknjq2
Six tracks of playful, twinkling math-rock instrumentals, reminiscent of Don Caballero's lighter moments, only with more discernible melodies and slightly less showboating. A fun and relaxing record to listen to.
The Replacements - "Stink E.P." (1982)

http://www.mediaf!re.com/?q23oojzzyi2
The newly remastered (with bonus tracks!) edition of The Mats' second ever recording sees them blast through a dozen numbers in under half an hour, including the usual scattershot garage-punk they were known for in the early 80s, as well as a couple of old rock'n'roll standards, a harmonica-fuelled romp in the form of "White and Lazy," and "You're Getting Married," a touching subdued solo number from vocalist Paul Westerberg. Classic.
Sylosis - "Casting Shadows E.P." (2006)

http://www.mediafire.com/?z3w2ddhvgmy
Debut E.P. from British thrash metal behemoths Sylosis. Unlike many of the other modern metal bands they've toured with, Sylosis don't resort to ridiculous downtuning or constant blastbeats to get their heaviness across. Instead, they go for knuckle-tight rhythmic riffs twisted around an Bay-Area thrash template, with just a tiny hint of metalcore and death metal to create variation. Also, guitarist Josh Middleton plays some of the most well-written melodic solos I've heard in a long-ass-time.