Google, Amazon and Microsoft are finally getting the syncing cloud storage thing right. But, Dropbox is still the player to catch. While the rest are still working on actually getting the desktop client stuff ironed out, the iconic blue box is spreading its tentacles across the web. Today Yahoo! announced a partnership that puts the pioneering storage service right in your inbox. Yahoo! Mail is now tightly integrated with Dropbox, allowing you to share files straight from your folders online or save attachments to them. The tie-in comes courtesy of Dropbox Chooser, which also means an end to size limits for email attachments. Anything over 25MB is shared through a Dropbox link, rather than directly attached to your message. If you're a Yahoo! user you should see the new options in your inbox today.