First of all let me point you to MTG Salvation, the site has had design change and for much better I must add.
And now to talk about the news on the next set ‘Lorwyn‘. Spoilers coming ahead, so if you want to be kept in the dark about Lorwyn don’t read any further.
From what is know, Lorwyn block will only have two sets as opposed to three sets as usual, followed by another 2 sets that are from another block (but as Mark Rosewater said on MTG.com these two blocks will have lots of synergy).
For sanctioned limited events only Lorwyn and Morningtide (the second set on the Lorwyn block) will be used. For Constructed purposes these 2 blocks act like a mega-block, so when Shadowfall comes out (that’s the main set of the block following Lorwyn), Time Spiral block won’t rotate from Standard.
Here’s the logo for Lorwyn:

And the Lorwyn expansion symbol: 
Other info:
Number of Cards: 301
Release Date: October 12, 2007
Prerelease Tournaments September 29-30, 2007
Previews start on magicthegathering.com September 10, 2007
Lorwyn supposedly is a more traditional fantasy setting for Magic, we’ll see races like Kithkin, Merfolk, Boggarts, Elves and Elementals.
From the preconstructed decks everything seems to point that this will be in some way a “Tribal” block.
There is also an announcement that there will be a new card type introduced that will become a standard part of magic. The one that are know that can show up are “Tribal” (shown in the card Bound in Silence, technically this card is a card from the future so it hasn’t been introduced) or “Planeswalker” (hinted at the reminder text on Tarmogoyf).
A poster recently has tipped the scale to Planeswalker:

The “They’re coming” sentence really foreshadows the new type and has this little detail:

Note the card frame is different from the usual black and the image extends to the name line like some Un-cards. Liliana Vess is an anagram of “a villainess”.
And here’s a card that’s confirmed as a Release Promo:

Evoke seems a nice keyword, you can pay the evoke cost and benefit from the creature’s triggered ability, functioning roughly like a sorcery. If there are a bunch of these creatures that have some useful abilities maybe a combo deck with pandemonium is not far off.
Well, and that’s what we’ve got until now.
Most of this info was taken from the MTG Salvation forums for your convenience. Hope you like it.