If you're feeling good about the market, you're not alone. Take my hand as we go over some of this week's more uplifting headlines.

1. Getting the Schwab done
There's a new player in the ETF space. Charles Schwab (Nasdaq: SCHW) launched four exchange-traded fundson Tuesday, giving investors a new way to play large caps, small caps, and international stocks.

Schwab isn't phoning it in here. The ETFs have dirt cheap expense ratiosbetween 0.08% and 0.15%. The discount broker is also sweetening the offerings by making them commission-free for Schwab customers.

Low expenses? No commissions? If Vanguard and its conventional indexing cronies aren't worried, it's probably because they're still haunted by those creepy Schwab ads with the rotoscoping animation.

2. Don't get mad, get satrad
Satellite radio's signal isn't fading after all. Sirius XM Radio (Nasdaq: SIRI) had nearly as many nuggets of good newsin its latest quarterly report as its receivers have channels .

The company also broke from its radio silence. CEO Mel Karmazin had suspended providing any kind of guidance beyond adjusted operating income targets a year ago. Sirius XM is now comfortable in also forecasting that its subscriber count will grow next year.

I guess you can't spell Karmazin without karma.

3. Come on in, the IPO waters are fine
Debutantes are still welcome down Wall Street, as long as they bring their pedigree papers.

Hyatt Hotels (NYSE: H) and Ancestry.com (Nasdaq: ACOM) went public yesterday, never trading below their IPO prices. The hotelier and genealogy website closed 12% and 5% higher, respectively.

Only a handful of companies have braved the brutal underwriting environment to go public this year. The key to a successful debut appears to be a recognized brand and some kind of financial momentum to win over the first wave of buyers.

4. A marketing pitch in 140 characters or less
If Twitter isn't ready to monetize its site, leave it to Amazon.com (Nasdaq: AMZN). The world's most popular online retailer is giving its affiliate marketers something to tweet about.

Members of the Amazon Associates program now have a " Share on Twitter" button on every Amazon.com product page. The option immediately creates a Twitter update, complete with a shortened link containing the associate's referral code. In other words, if someone buys an Amazon product from that link through Twitter, the affiliate makes as much as 15% on the sale. Continued...