Poster-Sized prints - Help!

Okay, so the company I work for is interested in ordering some of my prints to put in the office (yay!). However, they want the final size to be 30x40, and the pictures they want were taken with my 20D. These images are 2336 x 3504 pixels.... I'm pretty conservative and usually don't do prints larger than 11x14.


Just wondering if anyone knows any tips/tricks/software I can use that will help me make a decent enlargement. Or is it a hopeless case? The last thing I want to do is hand over a very poor looking print...


Any suggestions would be greatly appreciated!!

Onone has a PS plug-in called Genuine Fractals 6 that's supposed to be able to "enlarge your photo over 1000% without loss of sharpness or detail".


Check out their website at:


http://www.ononesoftware.com/detail.php?prodLine_id=7

I've use a company from the web called Full Size Posters. They seem to produce great results off my XTi and 1D mkII. i think they have some software tricks for getting the most out of your image....and you should have a pretty good starting spot of the 20D


http://www.fullsizeposters.com/

Thanks for the resources! I was able to talk them into doing a 24x36 print and used the enlargement technique in my Adobe Photoshop CS3 book by Scott Kelby. Prints came out pretty decent, though I'm interested to try fullsizeposters.com next time. Genuine Fractals 6 looks like good software, but just not in the budget for now. Many thanks!